If Activity A has to be performed before Activity B can start, then:
a. A is a predecessor to B.
b. B is a predecessor to A.
c. there is a discretionary dependency or external dependency between A and B.
d. the relationship between A and B can only be indicated on an AON network.

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.