read the sentence and question that follows
I heard mother on the phone say "Let me think oh thats right he had the basketball practice after school and then he said he was going to the library to study."
if the author wanted the reader to know that mother was pausing to think how should the author punctuate the sentence properly.
a. Let me think : Oh thats right
b. Let me think: oh, thats right
c. Let me think ; oh, thats right
d. Let me think! Oh, thats right