Asphalt Is the Refined Residue from Crude Oil

Multiple Choice

Asphalt is the refined residue from crude oil. When gasoline prices are high, oil refiners pull every last drop of gasoline out of a barrel of crude. This would imply that higher gasoline prices mean a(n) :

A) increased supply of asphalt, causing lower asphalt prices.
B) increased supply of asphalt, causing higher asphalt prices.
C) reduced supply of asphalt, causing lower asphalt prices.
D) reduced supply of asphalt, causing higher asphalt prices.