Maria has to choose between driving and taking a train to destination A. Travelling by train will cost her $400 and will take 4 hours. Driving to destination A takes 6 hours, and the required amount of gasoline costs $250. Her opportunity cost of time is $15 per hour.

Which of the following statements is true?
A. Maria should choose to drive as it saves her $150
B. Maria should choose to travel by train as it saves her S150 °
C. Maria should choose to travel by train as it saves her $10.
D. Mana should choose to drive as t saves her $10