What is one result of warming up your body’s muscles before exercising?
a you can exercise for more than an hour
b you will improve your overall strength.
c you will need to drink less water.
d your joints will have an increased range of motion.

D Your joints will have an increased range of motion.

Explanation:

The warming up of the body's muscles before exercise is important so as to attain a good range of motion and flexibility in the joints. The joints are not as much flexible like muscles, they remain rigid and stationary, so the movement of the joints is necessary. The movement of the joints during the warming up of exercise reduces the pain and inflammation which could occur during straneous exercise.  

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.