Which of the Following Examples Involves Deindividuation

Which of the following examples involves deindividuation?

A) Naomi decides to follow her classmates when they put on hoodies to obscure their identities and run out of the student union to spray paint on the Dean's car in the faculty parking lot.
B) Ben is bored with weeding and planting at the community garden and lets others do most of the work.
C) Diego feels even more strongly that his preferred candidate is the best choice after a class discussion.
D) Laura is visiting the beach with her friends and jumps off a very high rock into the water by herself.