Which sentence does not contain any punctuation errors?

A.
"Is the song "You're a Grand Old Flag" traditionally sung on Independence Day?" John wondered.

B.
"You're a Grand Old Flag' has such an upbeat melody," John observed.

C.
"Could we perform 'You're a Grand Old Flag at the concert?" John asked.

D.
"I've always loved the patriotic song 'You're a Grand Old Flag,'" John said.

Question

Which sentence does not contain any punctuation errors?
 
 A.
"Is the song "You're a Grand Old Flag" traditionally sung on Independence Day?" John wondered.
 
 B.
"You're a Grand Old Flag' has such an upbeat melody," John observed.
 
 C.
"Could we perform 'You're a Grand Old Flag at the concert?" John asked.
 
 D.
"I've always loved the patriotic song 'You're a Grand Old Flag,'" John said.

cookie_2046 · Answer

@confluxepic  and @Afrodiddle Do you guys know the answer?

cookie_2046 · Answer

In my opinion i think it's D i'm not really sure