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.

Option A. A is a predecessor to B.

Explanation:

If A must occurs before B, it means that A preceeds B and this is commonly describes as: A is a predecessor to B. Predecessor is simply an analogy used to describe an event or person that comes before the other event or person .

answer

procedural programming, object-oriented programming

explanation

procedural programming is a type of computer programming language that specifies a series of well structured steps and procedures   within its development period of time. it contains a systematic order of statements, functions and commands to complete a computational task or program. it is centered on creating procedures. while object oriented programming is a programming language that is centered on creating objects rather that actions and data rather than logic.. it has four principles which are inheritance, polymorphism, abstraction and encapsulation