The correct answer is B) because a run-on sentence is a sentence which is incorrectly punctuated. In this case, B doesn't have the right punctuation mark. Instead of a comma (,) perhaps a semicolon (;) should be used.
Answer:
B
Explanation:
You need to find out more about the topic before you cam begin making notes and so forth.
Answer: I think it's A.) He gives a beggar a valuable coin.
Explanation: