Answer should be A.
----hope it helps--------
Answer:
Hello,
Step-by-step explanation:
Let's assume A,B,C the 3 explorers and X,Y,Z the 3 guides.
Only A and X can operate the boat.

I hope you will understand the travels
C.
You distribute both the 2 and the -, combine like terms, add three to both sides and then divide out the 3 from 3 on both sides