Q: Fact 1: Most arthropods are insects. Fact 2: Arthropods Arthropods have jointed segmented exoskeletons. Given the two facts above, what have jointed segmented exoskeletons?

(I). insects; (II). mountains; (III). tortoises; (IV). barnacles; (V). humans; (VI). crocodiles; (VII). knee joints; (VIII). animals;
The answer is:
(I).