Which answer corrects the shift in verb tense in the sentence?
anthony's flight arrives at eight, but the cab driver forgot to pick him up.

a.
anthony's flight arrived at eight, but the cab driver forgot to pick him up.

b.
anthony's flight will arrive at eight, but the cab driver forgets to pick him up.

c.
anthony's flight has arrived at eight, but the cab driver forgets to pick him up.

d.
anthony's flight will arrive at eight, but the cab driver forgot to pick him up.