Mr McPiln Wants to Survey Customers on Whether They Were

Multiple Choice

Mr. McPiln wants to survey customers on whether they were happy with their customer service experience during last year's holiday season. However, Mr. McPiln is hesitant to do so because it has been a while since the customers had this experience. Mr. McPiln is concerned about:

A) sample bias.
B) retrospective bias.
C) hawthorn effect.
D) attrition.