Answer:
a.III
Explanation:
We solve for x:
4x > 15
it gives
x > 3.75
Now we have to analyze our choices and see which solutions satisfy this inequality.

is not greater than 3.75; this isn't a solution.

is not greater than 3.75; this isn't a solution.

is greater than 3.75; this is a solution.
Thus only choice III is correct.