1. which of the following best describes message flows?

a) message flows are continuous with each pool

b) message flows are modeled with solid arrows

c) message flows represent exhcanges between poolss

d) message flows may not cross pool boundaries

e) message flows may not cross lane booundaries

2.Which of the following is ture about end events?

a) an end event can catch a message

b) an end event can throw a message

c) an end event can be a timer event

d) an end event can be sahred among pools

e) non of the aboe is true