Cleo found an arthropod in a grassy field. The arthropod has six pairs of legs, two pairs of antennae, two body sections, and an open circulatory system.

Which conclusion is best supported by the information?
A The arthropod is an arachnid because it has two body sections and an open circulatory system.
B The arthropod is an arachnid because it has six pairs of legs and two pairs of antennae.
C The arthropod is a crustacean because it has two body sections and an open circulatory system.
D The arthropod is a crustacean because it has six pairs of legs and two pairs of antennae.

D

Explanation:

1. the geologists have established a set of principals that can can be used o determine the relative ages of rock. this principal is applied to sedimentary and volcanic rocks. the rocks exposed to wall of grand canyon has layers and by studying the number of horizontal layers in the rock(strata) the relative age can be determined. the layer first formed will appear at the bottom and the the layer of strata last formed appear at the top. by using this information the approximate age of rocks can be determined.

2. carbon dating is used to find the relative age of rock in numbers which means for the rocks that has age between 1-70,000 years.

3. for the rocks of age range between 1,000 - billion of years potassium-argon dating is used.