Question

My friend antonio is involved in many activities, including the environmental club, soccer, and martial arts. which is the best way to rewrite this sentence using a colon?

a.my friend antonio isinvolved in many activities: including the environmental club, soccer, and martial arts.
b.my friend antonio is involved in many activities: the environmental club, soccer, and martial arts.
c.my friend antonio is involved in many activities: the environmental club, soccer, and martial arts.

Answer 1

The correct answer on Novanet is the one that is NOT capitalized after the colon.

Answer 2

B and C look identical to me, so any of those two answers would be the correct one.
You have to use a colon before a list, where you numerate many items. So, here, you have to use the colon after the word activities:
My friend Antonio is involved in many activities: the environmental club, soccer, and martial arts.