Which of These Statements Is a Correct Version of Newton's

Multiple Choice

Which of these statements is a correct version of Newton's third law?

A) Whenever some object A exerts a force on some other object B, B must exert a force of equal magnitude on A in the same direction.
B) Whenever some object A exerts a force on some other object B, B must exert a force of equal magnitude on A in the opposite direction.
C) Whenever two forces act, they must be equal in magnitude and opposite in direction.
D) Whenever any object feels some force, it must also feel another force of equal magnitude in the opposite direction from some other source.