Answer:
A. a cardinal trait
Step-by-step explanation:
Mikhail Baryshnikov pervasive interest in dance is best described as a cardinal trait because his entire life has been dedicated to dance, and his work has been characterized by remarkable creativity and innovation, which make people refer to him as the greatest dancer of the 20th century.
Cardinal trait is refer to as an existing trait which is now seen as a person's identify e.g, generosity, diligence.