Answer:
A.the reliability and validity of intelligence tests
B. the nature of intelligence;
Step-by-step explanation:
(a) The reliability and validity of inteligence tests: in this case if Susan experience suggest that the results shows an average score meaning that the test result is reliable and consistent.
Secondly the test may be valid in term of finding what the test is measuring which is general intelligence.
(b) the nature of inteligence: due to the fact Susan is a brilliant pianist and highly acclaimed ballet dancer which might have caused her to have average intelligent score and in other way the test scores may not accurately represent her intelligence.