read the sentence.

i want to be a doctor, i have to do well in science class.

which revision most effectively corrects the comma splice?

a. i want to be a doctor doing well in science class.
b. wanting to be a doctor doing well in science class.
c. i want to be a doctor i have to do well in science class.
d. if i want to be a doctor, i have to do well in science class.

D. If I want to be a doctor, I have to do well in science class.

Explanation:

In the sentence given in the question, the main purpose or point of the sentence is -

in order to become a doctor, one needs to do well in the science class.

Now, according to the cause and effect relationship of the sentence, the cause is the "doing well in science class" part while the effect will be "becoming a doctor". For the latter to happen, the former has to be done first.

Thus, to rewrite the whole sentence in a correct way, it has to be written as

"If I want to be a doctor, I have to do well in science class", which correctly implies the cause and effect sequence of the proposed purpose of the sentence.

"why don't you like me the way i am? " i cried. "i'm not a genius! i can't play the piano, and even if i could, i wouldn't go on tv if you paid me a million dollars! "

explanation:

the conflict between jing-mei and her mother is over jing-mei's piano lessons since her mother wants her to become a prodigy but she does not want to play it any more.