Arthropods invaded land about 100 million years before vertebrates. This fact most clearly implies that .
a. arthropods have had more time to coevolve with land plants than have vertebrates
b. arthropods evolved before vertebrates did extant terrestrial
c. arthropods are better adapted to terrestrial life than are extant terrestrial vertebrates
d. vertebrates evolved from arthropods

Arthropods invaded land about 100 million years before vertebrates. This fact most clearly implies that a. arthropods have had more time to co-evolve with land plants than have vertebrates

Explanation:

Arthropods are invertebrates animals. Its evolutionary ancestry dates back to the Cambrian period and they have had more time to co-evolve with land plants than have vertebrates. The vertebrates share a common ancestor. Scientists believe that the last common ancestor of all arthropods is a modular organism with each module covered by its own sclerite.