Answer :
B. Add a comma and I wish they were green and gold after white
Cuz it is a separate independent clause joined by a comma
Plz mark as brill
Answer:
B. Add a semicolon and I wish they were green and gold after white.
Explanation:
Semicolons mean it's a compound sentence.
C and D do not make sense.
B cannot be it, because it would have to have a conjunction such as and, but, or after the comma.