State Whether Each of the Following Examples Is an Issue

Short Answer

State whether each of the following examples is an issue of reliability or validity:
A) Data entry errors
B) Only one reading taken by one evaluator for the data point in a study that uses blood pressure as one of the indicators
C) Administration of a food frequency questionnaire to a 7-year-old
D) A Likert scale survey question whose only options are "agree" and "disagree"