Which of the following must be true for hydrocarbons to be collected by a fault trap?
a. The hydrocarbons must migrate through porous rock
b. The fault trap must have a seal that prevents the hydrocarbons from escaping
c. The fault trap must be located at a depth where hydrocarbons can accumulate
d. The fault trap must be intersected by a fault that creates a barrier for the hydrocarbons to accumulate