What is the main cause of an inactive lifestyle?

a. modern conveniences

b. access to video games and television

c. the aging process

d. longer work days

The main cause of inactive lifestyle is modern conveniences. The use of the car or public transport leads to walk less. The use of elevators leads to using less use of stairs. The use of refrigerator leads to going less to the buy food. The use of TV and video games lead to less physical activity.

D longer work days i think i am not positive