"People who are farsighted suffer from just the opposite problem." The word "suffer" in this sentence refers to ______.

A．have an eye difficulty that cannot be corrected by glasses
B．have eyes that are not exactly the right shape
C．have a difficulty that can be corrected by an operation
D．have a curable disease in their eyes

A．seeing at night
B．seeing objects far away
C．looking over a wide area
D．judging distances