Final answer:
The converse of the given conditional statement is option (a): "If Julie receives an A, then she scores 90 or above," which correctly switches the hypothesis and conclusion of the original statement.
Step-by-step explanation:
The converse of the conditional statement "If Julie scores 90 or above, then she receives an A" is "If Julie receives an A, then she scores 90 or above." This is option (a). To form the converse of a conditional statement, you switch the hypothesis (the part after "if") and the conclusion (the part after "then"). Therefore, the initial conditional statement had the hypothesis that Julie scores 90 or above and the conclusion that she receives an A. In the converse, the hypothesis is that Julie receives an A and the conclusion is that she scores 90 or above.