Which of the following describes the best strategy for increasing a specific joint's range of motion?
a. developing a rigorous whole-body exercise program
b. avoiding stretching before vigorous exercise
c. applying the principles of overload and progression to exercise the joint
d. spending two hours swimming daily

I choose letter a. developing a rigorous whole-body program.  This exercise targets the joints and requires a wide range of motion that increases their flexibility. This will target the joints as well as multiple areas of the body involving a wide range of motion in the joints and muscles.

transportation i would say maybe sorry it its not correct

to prevent people from getting the ebola virus, countries around the world paid to doctors develop a new vaccine. now that the vaccine has been made, doctors will need to experiment on a large number of people to find out if it works safely.

what is the greatest limitation that scientists are dealing with as they try to figure out how to experiment with the ebola vaccine?

meditation is a practice of sitting still and quiet for minutes or even hours. it has been practiced for thousands of years and is even a part of religious practices for some people. carefully controlled, repeated measurements of brain activity have shown that meditation does increase certain chemicals in the brain and even grows the part of the brain that people connect with their current surroundings and activities.

are claims about the effects of meditation most likely scientific or pseudoscientific?

not pseudoscientific, because people have made claims about it but scientific observations have not been made