Mario was attempting to develop a cure for the flu. mario gave three test subjects, all sick with the flu, massive doses of vitamin c. all three subjects recovered within a week. mario concluded that massive doses of vitamin c will cure the flu. why did the scientific community deem mario's research to be invalid?

The correct answer is - there is no control group to compare results.

Explanation:

A control group is a group that is used in the experiment in order to get an accurate relation between the independent group and the dependent group. It is kept constant during the experiment.

In this clinical research, there is no control group or nothing is constant as all three subjects got the same treatment so there is nothing to compare the result with and prove its effect. So, it is not validated by the scientific community as there is nothing to compare or check with.

Thus, the correct answer is- there is no control group to compare results.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.