The option that demonstrates the correct way to use a comma is:
Spencer is planning on getting a job after high school, but his parents want him to go to college.
This sentence correctly uses a comma before the conjunction "but" to connect two independent clauses.
The other options have incorrect comma usage:
- In the first option, a comma is incorrectly placed before "in Connecticut."
- In the third option, it incorrectly connects two independent clauses without a conjunction or proper punctuation.
- In the fourth option, it incorrectly connects two independent clauses with a comma instead of using a semicolon or a conjunction.