Sarah is considering two investment proposals. Proposal A is to purchase a new computer. Proposal B is to purchase a new printer. She will not buy the printer unless she buys the computer. The relationship between Proposals A and B is best described by which of the following?

a. B and A are mutually exclusive

b. \(\mathrm{B}\) is contingent on \(\mathrm{A}\)

c. \(\mathrm{A}\) is contingent on \(\mathrm{B}\)

d. Not enough information is given to determine a relationship