Which of the Following Examples Illustrates an External Attribution Style

Which of the following examples illustrates an external attribution style?

A) Ron gives up efforts to lose excess weight after repeated setbacks in his diet and exercise plan.
B) Miguel realizes he lacks the talent to become a successful guitar player and discontinues his guitar lessons.
C) Cynthia collects rare and exotic animal figurines and shows off to friends and family.
D) Maria loses the inter-school swimming competition and agrees that she lost because the competition was challenging and resolves to work harder.