I Want to Fence in a Rectangular Vegetable Patch

Multiple Choice

I want to fence in a rectangular vegetable patch. The fencing for the east and west sides costs $4 per foot, while the fencing for the north and south sides costs only $3 per foot. I have a budget of $120 for the project. What is the largest area I can enclose ?

A) 12 square feet
B) 150 square feet
C) 120 square feet
D) 300 square feet
E) 75 square feet