Which information did the glomar challenger study in 1968?

a. the rate of seafloor spreading.
b. the direction of seafloor spreading
c. the age of rocks in various places in the ocean.
d. the contents of rocks in various places in the ocean

Answer: C. the age of rocks in various places in the ocean.

Explanation: The main purpose for the Glomar Challenger was to drill into the deep ocean floor and collect core samples. By studying the age of the core samples, the scientists were able to provide evidence sustaining Alfred Wegener's thery of gontinental drift. It also provided further evidence for plate tectonics theory of W. Jason Morgan and Xavier Le Pichon.

the answer is "a.) well–developed vascular system."

explanation: