Answer: a) have validity.
Step-by-step explanation:
The validity of a test refers to the extent to which the test measures what it indicates it should measure. That is, the results are consistent with the variable that wants to measure.
When people perform personality tests sometimes they lie to generate a good or bad impression, this is why the validity of the test is compromised. To avoid this, various tests measure the validity of the results. The tests are invalid if they do not meet the validity criteria.
I hope this information can help you.