It would be B because you don't need a comma on the last one.
Collective noun usually refers to a group of people. most times you see it, it'll be followed by a singular verb or plural verb as well.
Answer:
can i tell u this story about when i had a dump, so like i just ate chetos so my butt was on fire and their was some fish i saw and i dicided it looked good so i ate it.
Explanation:
The anwser is %75 im adding extra words cause it has to be atleast 20 characters lol