HELP ME PLEASE

Wait a few more minutes they said they would be here within an hour.

What is the best way to change the sentence above?
A.
Wait a few more minutes, they said they would be here within an hour.
B.
It's correct as is.
C.
Wait a few more minutes; they said they would be here within an hour.
D.
Wait a few more minutes, although they said they would be here within an hour.