Which option best corrects this sentence: "CALLED AND LEFT A MESSAGE"?

A. Mike called and left a message.

B. At 6 o'clock while I was in the shower.

C. Again, another message from Mike.

D. Messages on the machine from Mike.

---

Which sentence is a run-on sentence?

Darius is my best friend he is an amazing musician.

A. Darius, an amazing musician, my best friend.

B. Darius, my best friend, is an amazing musician.

C. Darius is my best friend and an amazing musician.

D. Darius, my best friend, is an amazing musician.