"joan scores 65 on an iq test but does not show signs of adaptive problems. can she be considered intellectually disabled? " a. maybe, but she must first show a low iq after age 18. b. yes, because her iq score requires such a diagnosis. c. no, because she must show adaptive problems. d. no, because her iq test score is too high.

I believe the answer is:  C. No, because she must show adaptive problems.

Adaptive problems refers to the difficulty to follow a certain standard but the causes of the failure is extremely hard to identify.
People with the IQ of 80 or lower tend to face difficulity to follow a standard, but the causes of this problem could be easily identify (the brain process is to low to follow instructions at normal speed)