Which of the following is indicative of a ‘finish-to-start’ direct relationship in a project schedule?

Which of the following is indicative of a ‘finish-to-start’ direct relationship in a project
schedule?

A.
Activity A must begin before Activity B can end.

B.
Activity A must begin before Activity B can begin.

C.
Activity A must end before Activity B can end.

D.
Activity A must end before Activity B can begin.