19. Dave: Grandma, you need to renew your driver's license if you want to keep driving.

Grandma: But I'm just 71. I thought only people over 75 had to do it.

Dave: Not anymore. The new rules say people have to renew their licenses at 70 now. 

Grandma: That won't be a problem. I'm very healthy. _______. 

Dave: I totally agree, Grandma. I believe I'll still get rides from you.
(A) Maybe I should sell my car right now.
(B) Maybe it's time for me to stop driving.
(C) I'm sure I can get my license renewed.
(D) I'll wait until I turn 70 to renew my license.