Sam is known to be the fastest worker in the mail room. He has worked in the mail room for only a ...

Sam is known to be the fastest worker in the mail room. He has worked in the mail room for only a short time, but prides himself on being competent and a quick learner. He often gets positive comments from coworkers and his boss, which helps to motivate him and has a positive effect as he continues to challenge himself at work. As a result of his efficient style, he is also given more freedom than other workers, as his boss is impressed by his ability to sort and organize mail. Sam is likely to be ________ motivated as he continues to challenge and push himself to perform even better each day.
withinsically
extrinsically
intrinsically
superiorly