Ekman and friesen (1969) suggested that there are multiple ways in which display rules can modify expressions. when a person expresses an emotion less than she actually feels it, this is referred to as:

The correct answer is deamplification. 

Ekman and Friesen define deamplification as the process wherein an individual does not externally express an emotion he or she is feeling. For instance, if you are upset after receiving some bad news, but make sure you don not appear sad through your facial expressions since you have to give a speech, you are demonstrating deamplification. 

Isay b but i'm not sure.