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 join two independent clauses.
The other options contain errors related to comma usage:
- Option 1 repeats itself with no different phrasing.
- Option 3 has a comma splice (two independent clauses joined incorrectly with just a comma).
- Option 4 incorrectly places a comma before the prepositional phrase "in Connecticut."
So, the correct option is the one about Spencer.