Select all that apply.

a vector always consists of

a) a force
b) mass
c) size
d) direction

The correct options are (C)and (D) are correct.

Explanation:

A vector is defined as quantity which have magnitude and direction. it is represented by the arrow whose direction is same as that of the quantity.Fro example : velocity, force, acceleration , work done etc.

Magnitude is a term which means size or extent or importance of something.

From this we can conclude that vectors always consists of direction and size(magnitude). Hence options(C)and (D) are correct.

the answer for apex is the lowest