Three species of lizards of the genus Gallotia are found on the Canary
Islands, a chain of seven volcanic islands off the west coast of Africa. The
easternmost island, Lanzarote, is the oldest, while the westernmost island, EI
Hierro, is the youngest. The distribution of lizard species is shown on the map
Which statement about the ancestry of the lizards from the genus Gallotia is
best supported by this information?

a. The ancestors of each species evolved in Spain and were brought to the islands at the same time
b. The common ancestors of the lizards probably came from Africa.
c. The ancestors of each species came from different continents at different times
d. The ancestor of the lizards first colonized the island of El Hierro