When alexandra was told that she correctly answered 70%of the items on a math achievement test, she asked how her performance compared with that of the average test-taker. her concernwas directly related to the issue of?

The correct answer is standardization.

Standardization when it comes to tests refers to tests or exams that administer the same questions or assessments to everyone taking the test.Since a large number of individuals take the same standardized tests (such SATs or ACTs) it is possible to compare the performance of an individual test taker with other test takers or with the average performance of all test takers.  

Ithink the answer you are looking for is (b).

Yes you can but you need to figure out your time of your work like make a plan for what you need to do.