Tunnel vision means a person has difficulty seeing things ... A. in the upper range of their field of vision.
B. on the edges of their field of vision.
C. through the center of their field of vision.

B.

Explanation:

Tunnel vision is the loss of peripheral vision, or edges of your sight. They call it "tunnel vision" because it looks like you are looking through a tunnel, as you have no peripheral vision.

C. through the center of their field of vision.

Explanation:

You can see well when staring straight ahead, but it seems as though you're looking at things through a narrow tube.

absolute strength refers to the maximum force exerted by a body irrespective of body size. relative strength on the other hand is the force exerted by a body in relation to muscle size or body weight.

so the answer is: c. absolute strength measures strength regardless of your body size, while relative strength measures strength adjusted for your weight.