Answer:
C. is producing with the least-costly combination of X and Y,but could increase its profits by employing more of X and less of Y
Explanation:
At equilibrium
We know that
MRPx ÷ MRPy = wx ÷ wy
So, according to the question, it is
100 ÷ 6< 50 ÷ 20
This means that MRPx ÷  wx  > MRPy ÷  wy
In this way, the equilibrium x would be rise and y would be decreased
Therefore the correct option is c. Â
And, the rest of the options would be seems wrong