More than percent of north americans suffer back pain in their lifetime. a. 50b. 60c. 80d. 90

80%

Explanation:

More than 80% of the individuals gets affected by the back pain in their lifetime. This is because of their unhealthy lifestyle.

The posture of people now days is not correct and they spend so much time on computers and laptops that their spinal cord gets affected by it.

Such activities affects the body and most of the people are suffering from the problem of back pain.

It is common in older age group but due to unhealthy living condition it has been spread into smaller aged people.