According to a Recent Test Using a Snellen Chart,your Roommate's

According to a recent test using a Snellen chart,your roommate's vision is 20/70.What does this mean?

A) The results indicate that your roommate's eyesight is better than normal.
B) The results are consistent with normal visual ability.
C) The results indicate that objects that your roommate can see clearly at 20 feet can be seen clearly at 70 feet by a person with normal vision.
D) The results indicate that objects that your roommate can see clearly at 70 feet can be seen clearly at 20 feet by a person with normal vision.