Which of the Following Is a Difference Between a Halo

Which of the following is a difference between a halo error and a horns error?

A) A halo error is the opposite of a distributional error, whereas a horns error is the opposite of a contrast error.
B) A halo error occurs when all aspects of an employee's performance are rated positively, whereas a horns error occurs when all aspects of an employee's performance are downgraded.
C) A halo error is a performance selection error, whereas a horns error is a performance rating error.
D) A halo error occurs when people are compared against one another instead of against an objective standard, whereas a horns error occurs when a rater tends to use only one part of a rating scale.