Answer:
Option A is correct that is $15.
Explanation:
Caroline bought 20 shares of stock at
, and after 10 months the value of the stocks was
.
We need to calculate the profit which is the difference of the two values of the stock.


The above value is for 1 share we have to calculate it for 20 shares
So, we will multiply it with 20 we get:

Therefore, Option A is correct that is $15.