Multiply each row in the first matrix by each column in the second matrix:
1*2 + 3*3 + 1*4 1*-2 + 3*5 + 1*1
-2*2 + 1*3 + 0*4 -2*-2 + 1.5 + 0*1
Simplify to get
[15 14
-1 9]
The third choice is the correct answer.
