Which sentence uses dashes correctly?

A.
The music teacher gave him a choice of horns—for example, the trumpet, the tuba, or the saxophone.

B.
The phone—just kept ringing and ringing all afternoon.

C.
A red chair sat in front of—the fireplace.

D.
We had one thing in mind: swimming—in the ocean.

Question

Which sentence uses dashes correctly?	
 
 A.
The music teacher gave him a choice of horns—for example, the trumpet, the tuba, or the saxophone.
 
 B.
The phone—just kept ringing and ringing all afternoon.
 
 C.
A red chair sat in front of—the fireplace.
 
 D.
We had one thing in mind: swimming—in the ocean.

cookie_2046 · Answer

A.
The music teacher gave him a choice of horns—for example, the trumpet, the tuba, or the saxophone. 
I'm 100% sure it's A.