The answer is B. The introductory text in the sentence cannot stand alone.
Thus, the introductory text in the sentence cannot stand alone explains best why the colon after "including” should be removed.
Answer:
I am pretty sure he did it so the readers can understand All the characters
Answer:

Explanation:
Vitamin C is obtained <u>from</u> citrus fruits.
“from” is used here to refer the place that something comes out of.
Explanation:
They would act like jealous or something if they saw everyone in a group accept they were the only one and they would act sad