为自己加油

What did Ricks mean by saying "come on, this could be anybody's grandma." in Paragraph7?（ ）  

A.
He tried to emphasize Griffith's age. 
B.
He tried to find out Griffith's identity. 
C.
He tried to urge the boys to help Griffith. 
D.
He tried to be polite and show respect to Griffith.