Christy failed to notice that she received her ice cream in a sugar cone rather than a waffle cone as she had requested. she later indicated to another customer that she preferred sugar cones over waffle cones. christy's behavior most clearly illustrates:

choice blindness

Explanation:

Choice blindness is the condition that people have when they do not know what they actually want. This occurs because of the fact that people do not understand how they feel towards something. When two choices are given and we get the choice that we did not want then we start thinking in a way that justifies the choice given to us.

Here, Christy wanted a waffle cone but got a sugar cone instead. Then she tries to console herself that she preferred sugar cones over waffle cones. She is not clear on what she wants.

Hence, her behavior illustrates choice blindness.