Sally Is Asked 10 Questions and Is Told to Give $5 \%$

Multiple Choice

Sally is asked 10 questions and is told to give her answer in intervals such that $5 \%$ of the time the correct answer fell above the interval and $5 \%$ of the time the answer fell below the interval. The experimenter concludes that Sally is calibrated. For how many questions did the true answer fall within Sally's given intervals?

A) 9
B) 5
C) 10
D) 8