What is one criticism of projective tests? they are inappropriate for use with children. they are too simple in their administration and scoring. they have low validity and reliability. they fail to take into account differences in the testing environments. they have interpretive categories that are too narrow?

I believe the answer is: They have low validity and reliability.
In projective test, We collect the data by exposing the subject with ambigous stimuli in order to obtain the a certain psychological response. After that, the psychologist would analyze the data and interpret the response.
Since the interpretation is extremely subjective the data would has low vailidity and reliability.