The Hypothesis That There Is a Genetic Component to Some

The hypothesis that there is a genetic component to some attitudes would be supported by the finding that

A) attitudes of identical twins are more similar than those of fraternal twins.
B) adults who shared certain physiological characteristics also had common political beliefs.
C) when asked about attitudes for which there seems to be a genetic predisposition, research participants were quicker to respond to questions and less likely to alter their views toward social norms.
D) All of these