Demi Converted Scores from a Customer Service Questionnaire to Z

Multiple Choice

Demi converted scores from a customer service questionnaire to z scores, and some of them are negative.She is trying to use a z table but is confused because there are no negative z scores in the tables.What should she do?

A) Use the positive value because the normal curve is symmetric.
B) Square the negative z-score value so that it becomes positive.
C) Add 1.0 to the negative z-score value so that it becomes positive.
D) Use 0 as the value for the z score.