Although fullerenes - spherical molecules made entirely of carbon-were first found in the laboratory, they have since been found in nature, formed in fissures of the rare mineral shungite. since laboratory synthesis of fullerenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypothesis about the state of the earth's crust at the time these naturally occurring fullerenes were formed.
which of the following, if true, most seriously undermines the argument?

(a) confirming that the shungite genuinely contained fullerenes took careful experimentation.
(b) some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.
(c) the mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed.
(d) the naturally occurring fullerenes are arranged in a previously unknown crystalline structure.
(e) shungite itself is formed only under distinctive conditions.

4. interpret how do the speaker's descriptions of and feelings about the wind change as the poem progresses? how does this shift show a change in the tone of the poem?

Which part of the story shows how kiara and tanya's differences affect their friendship? kiara and tanya were the best of friends. when they were 10 years old, they always went everywhere together. all their friends knew that if they found one of them, they would find the other. anyone who didn't know them thought that they were twins because both kiara and tanya had long, silky red hair and pale complexions. they were even similar in height and build. they were more like sisters than friends. but as similar as they were in appearance, they were just as different when it came to their personalities. this difference didn't affect their friendship, at least not for a long time. kiara always got out and participated in activities and competitions. tanya was happiest when reading a book at home. kiara was outgoing and talkative. tanya was quiet and shy. kiara was popular, and people were drawn to her because of her ability to make quick friends. tanya hardly had any friends besides kiara. as they grew older, kiara managed to make a large group of friends. tanya, on the other hand, still remained shy and reserved. this difference in their personalities eventually caused a rift between the two friends. tanya would refuse invitations to parties and movies that kiara invited her to. she just didn't want to hang out with people she didn't know that well. kiara couldn't understand why. she thought tanya disliked her friends. eventually, kiara and tanya both realized that they had outgrown one another. they still remained friends, but they were not as close as they once had been.

Select the sentence using an appositive to further explain the subject. the water is cold, but the sand is warm. mr. miller, the dean of the school, makes you feel very humble running in the relay, bob tripped and fell.