Answer:
Sentence 2 is right.
Explanation:
Since Ana is doing the training in which three skills are taught. So it is for sure that if she spends an hour for swimming, that hour cannot be utilized for acquiring other skills such as biking or running. So she has to make a choice and while making a choice she has to forgive other option. That is opportunity cost for her, the next best alternative forgone
Trello!
it should be TRUE!
have a nice day :D
:>
