Read the following statements.

Assertion(A): The movability at different joints varies depending on various factors.

Reason(R): Bones act as levers, and joints function as the fulcrums of these levers. 

In the light of given statements, choose the correct answer from the options given below.

In producing movement, bones act as levers, and joints function as the fulcrums of these levers. A lever is a rigid structure that can move around a fixed point called a fulcrum. The movability at these joints vary depending on different factors.

Factors that affect the mobility of joints:

1. Tissue bulk (excessive muscle or adipose tissue bulk impedes range of motion)
2. Activity level (active individuals are generally more flexible than inactive individuals)
3. Injury or dysfunction
4. Age (more flexible in younger individuals)
5. Gender (more flexible in females)