Which sentence contains a punctuation error?

A.
We obediently followed the self-assured young man.

B.
The ex-mayor invited the former senator to lunch.

C.
The museum's expert on pre-Columbian art is teaching that class.

D.
We learned that the president elect will be here tomorrow for a brief speech.

Question

Which sentence contains a punctuation error?	
 
 A.
We obediently followed the self-assured young man.
 
 B.
The ex-mayor invited the former senator to lunch.
 
 C.
The museum's expert on pre-Columbian art is teaching that class.
 
 D.
We learned that the president elect will be here tomorrow for a brief speech.

johnnewman · Answer

@BigDreams

bigdreams · Answer

I'm not fully sure, but, it's either D or B

blazingblitz · Answer

B 
senator should be capitalized