Consider two call options written on ABC Inc.'s stock. The first call, C1, has an exercise price of $30. The second call, C2, has an exercise price of $50. Both calls have the same expiration date. Today is the expiration date. C1 is in the money while C2 is out of the money. Which of the following is true about ST, the stock price on the expiration date?

Answer Choices:

A) ST > $30

B) ST > $50

C) $50 > ST > $30

D) ST < $30