Shenron has been interviewing a lot of respondents since 10 A.M. in the morning. It's 5.30 P.M. and he wants to go home as he is tired. With his final respondent, he forgets asking a few questions and also forgets to take notes. Which of the following data collection errors is evident here?
a. Respondent misunderstanding
b. Interviewer cheating
c. Fatigue-related mistakes
d. Nonresponse
e. Respondent distraction
Answer: c. Fatigue-related mistakes