Why Are Likert Scales Written So That on Half of the Responses

Multiple Choice

Why are Likert scales written so that on half of the responses, agreeing with the item means the person has the variable being measured, whereas on the other half, agreeing with the item means that the person does not have the variable being measured?

A) So that there is variety in the questions
B) To reduce the influence of self-promotion
C) To reduce the influence of guessing the hypothesis
D) To reduce the influence of acquiescent responding