Robert wants to test his Spanish skills. So, he took TOEFL several times. His scores are 80,
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Question:
Robert wants to test his Spanish skills. So, he took TOEFL several times. His scores are 80, 119, 100, 65. In testing his Spanish skills, TOEFL is __________.
a. reliable but not valid.
b. neither reliable nor valid.
c. not reliable but valid.
d. both reliable and valid.
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