Psychological tests show that 18-year-old Isaiah has an intelligence score of 65. Nevertheless, Isaiah can, with a few seconds of mental calculation, accurately tell the day of the week on which Christmas falls for any year in this century. It would be fair to conclude that

A)the intelligence test Isaiah was given has no validity.
B)intelligence tests are generally good measures of verbal but not of mathematical intelligence.
C)Isaiah is a person with savant syndrome.
D)Isaiah excels in divergent thinking

C) Isaiah is a person with savant syndrome.

Explanation:

Savant syndrome refers to a condition in which a person with important mental disabilities shows special skills in which they excel, mostly associated with a massive memory.

An IQ under 70, such as the 65 that Isaiah has, makes him a person with an intellectual disability. However, his peculiar skill shows that he might have Savant syndrome.

Around 10% of people with autistic disorder have Savant syndrome at different levels, although it also appears in people with other developmental disabilities.

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