Alex Brought His Lunch Today but Now a Coworker Has

Multiple Choice

Alex brought his lunch today but now a coworker has asked him to go to the deli across the street. Select the correct statement from the following.

A) The cost of the lunch Alex had brought is relevant to Alex's decision to have lunch with his friend.
B) The cost of the lunch that Alex had brought has nothing to do with his current decision.
C) The cost to buy lunch at the deli is not relevant because it has not yet been incurred.
D) The cost of the lunch Alex already has represents the opportunity cost of dining with his friend.