Frank is from Atlanta and Maria Tuberto Barbero is from Ciudad de México. They became pen pals and communicate by phone because they love to talk in addition to communicate through emails. Based on what you learned, how would Frank dial Maria's phone numbers when he talks to her?

a)
800 010 332 10

b)
55 99 01 72 58

c)
505 979 01 72 58

d)
34 972 50 59 03