Alex brought his lunch today but now a co-worker has asked him to go to the deli across the street. Select the correct statement from the following. o The cost of the lunch that Alex had brought has nothing to do with his current decision. O The cost of the lunch Alex already has represents the opportunity cost of dining with his friend. O The cost of the lunch Alex had brought is relevant to Alex's decision to have lunch with his friend. O The cost to buy lunch at the deli is not relevant because it has not yet been incurred