You are correct. The answer is C
Answer:
If I don't gain enough experience, I can't be a lifeguard this summer.
The sentence "If I don't gain enough experience, I can't be a lifeguard this summer" shows that if the person does not get enough experience, then they will not be a lifeguard at the beach.
A condition is like a cause and effect relationship.
It helps Tan explain the various important roles that language plays in our lives.