Which setting in the /etc/system file limits the maximum number of user processes to 100 to prevent

Which setting in the /etc/system file limits the maximum number of user processes to 100 to prevent a user from executing a fork bomb on a system?

A.
set maxuprc = 100

B.
set maxusers = 100

C.
set user_procs = 100

D.
set max_nprocs = 100