Answer:
e) The term "self-confidence" cannot be defined.
Step-by-step explanation:
The term self-confidence can be narrowed down to actions that can be measurable, when doing an experiment you have to have something that can be measured, the term "Self confidence" can´t be measured and is subjective, what one people say reflects Self-confidence others wont. The experimental flaw that Kirk made was basing his experiment on subjective terms.