Hello!
The answer is:
The correct answer is c.

Why?
To calculate the slugging average or slugging percentage, we need to divide the number of total bases by the total times at bat.

We know that:
A single means 1 base.
A double means 2 bases.
A triple means 3 bases.
A homerun means 4 bases.
So, we know that:

Then, substituting and calculating we have:


Hence, the correct answer is c.

Have a nice day!