Using Parabiotic Mice to Investigate Genetic Influences on Obesity, It

Using parabiotic mice to investigate genetic influences on obesity, it was found that ______.

A) if ob/ob mice were paired with normal mice, the ob/ob mice starved
B) if ob/ob mice were paired with normal mice, the normal mice starved
C) if db/db mice were paired with ob/ob mice, the ob/ob mice starved
D) if db/db mice were paired with normal mice, the db/db mice starved