Answer:
D. Accuracy; Consistency
Step-by-step explanation:
In research studies validity refers to the accuracy of the concept. For example, a research on depression would not be counted as valid or accurate if the researcher shows more data about anxiety or any other mental illness. This is because the purpose of the research was to find information on depression.
Reliability of the research refers to the extent to which a research methods gives consistent results. An alarm clock is the best example of consistency because it keeps ringing until you snooze it. However, it wouldn't be accurate if it rings at 7:00 am when you set it for 7:30 am.