According to the Implications of Recent Research, Particularly That of Carver

According to the implications of recent research, particularly that of Carver and White using the BAS/BIS Sensitivity Scale, what individual difference variable may underlie personality, happiness, and a wide variety of behaviors such as achievement, self-control, and personal goals?

A) differences in people's basic approach and avoidance motivational orientation
B) differences in the strength of people's impulse restraint system
C) differences in people's eudaimonic versus hedonic orientation
D) differences in genetic versus environmental influences on well-being