A Number of Studies Have Indicated That If One Identical

A number of studies have indicated that if one identical twin is diagnosed with depression, there is:

A) less than a 10% chance that the other twin will also be diagnosed with depression
B) a 100% likelihood that the other twin will also be diagnosed with depression
C) a 50% or greater chance that the other twin will also be diagnosed with depression
D) very little chance that the other twin will develop depression, but he or she will be at greater risk for other psychological disorders