OK YALL I REALLY NEED YOUR HELP AND MY TIME IS RUNNING OUT TODAY!!!
I Dont have the time to wait 12 hours if i dont pass benchmark to retake it & I have another chapter an a final surveytest due by midnight for credit recovery. SO PLEASE HELP ME ON THESE QUESTUONS TODAY.. IM BEGGING HERE !!!

Simplify: √63

My Options Are:

a. ^3√21

b. ^3√7

c. ^9√7

d. ^7√3