Answer:
A comma and a subordinating conjunction.
Step-by-step explanation:
The compound sentences employ distinctive punctuation marks depending on the structure of the sentence. In order to punctuate a compound sentence carrying two independent clauses is using a comma before the subordinating conjunction. For example:
- "I really want to go home, but I am too sick to drive."
- "He ran out of money, so he decided to quit playing."
The other way could be the use of a semicolon. For example:
- "The sky is clear; the stars are twinkling."
- "I am happy to see you here; it would be great if you keep coming."