Air Travel from New York to Miami Costs $300 and Takes

Air travel from New York to Miami costs $300 and takes 6 hours. A bus ticket between the cities costs $150 and takes 56 hours. Other things constant, the minimum value of one's time that would induce a rational individual to fly rather than drive would be

A) $1 per hour.
B) $3 per hour.
C) $5 per hour.
D) $50 per hour.