As People Age,the Lens of the Eye Loses Its Ability

As people age,the lens of the eye loses its ability to accommodate,and it tends to remain flat instead of becoming fat and round.What does this suggest about the effects of aging on vision

A)  We become less likely to detect differences in light purity. 
B)  We become more likely to detect differences in brightness and hue. 
C)  We lose the ability to focus on objects that are close. 
D)  We lose the ability to focus on objects in the distance.