ANSWER

Step-by-step explanation
The force of an object (f) is equal to its mass (m) times its acceleration (a). Thus, the formula for calculating force is f = ma.
We want to solve this relation for 'a'.
We need to divide both sides by 'm'
This implies that,

We cancel out the common factors on the right hand side to obtain:

We can rewrite this as:

Or

The correct choice is B.