A sugar cone for ice cream is shaped like a cone. If a sugar cone has a slant height of 4 inches and a diameter of 2 inches, what is the lateral surface area of the cone? Use 3.14 for pi. [Hint: Exclude the base.]
A. 18.8 square inches
B. 15.7 square inches
C. 37.7 square inches
D. 12.6 square inches