Which of the following is NOT a valid reason for defects in color vision?

What is the most common bone disorder in the United States?

A) Osteoporosis B) Osteoarthritis C) Paget's disease D) Cerebral palsy

_______________ x-rays have some advantages. They take less time and expose the patient to from 60 to 90 percent less radiation

Fill in the blank(s) with correct word