Answer
D.Experimental bias
Explanations
Experimental bias occurs when a scientist performing a research influence the results in order to portray a certain outcome.In this case,Ron unintentionally smiled when then subject was showing to act as expected.In doing so,"smiling" the subject was able to identify the correct answer.
A branch of visual arts that operates in three dimensions
You are correct its false.
To represent whom they where if the r important or not
Creative directors play an essential role in the marketing, you have to be creative, you have to bee good in the digital department. you work with copy writers, grapic designer, web designer, account managers, and other marketers on a daily basis
