What do Timer Events and Conditional Events have in common? Note: There are 2 correct answers to this question.

What do Timer Events and Conditional Events have in common? Note: There are 2 correct answers to this question.
A . They can only be used as start events.
B . They can only be catching-type events.
C . They can only be throwing-type events.
D . They cannot be used as end events.

Answer: A B