Will give out medals. Which answer corrects the shift in verb tense in the sentence?

Jennifer's practice started at five o' clock, but her mom drops her off late.

Question

Will give out medals. Which answer corrects the shift in verb tense in the sentence? 

Jennifer's practice started at five o' clock, but her mom drops her off late.

anonymous · Answer

A.
Jennifer's practice starts at five o' clock, but her mom had dropped her off late.
 
 B.
Jennifer's practice will start at five o' clock, but her mom drops her off late.
 
 C.
Jennifer's practice had started at five o' clock, but her mom drops her off late.
 
 D.
Jennifer's practice started at five o' clock, but her mom dropped her off late.

anonymous · Answer

Pretty sure it's D