Answer:
C
Explanation:
The way you do this is that you remove the sentence with the answer option.
For example, if we remove "For his twelfth birthday, his parents had enrolled him in a water sports class," does it make sense? It doesn't because its skipping the part where he learns.
The answer is C because the others won't make any sense.
Only C makes sense when it's removed.
Hope this helps plz hit the crown :D