Use the Following Information for Questions

Multiple Choice

Use the following information for questions:
Suppose that amount spent by students on textbooks this semester has approximately a bell-shaped distribution. The mean amount spent was $300 and the standard deviation is $100.
-Which choice best completes the following sentence? About 68% of students spent between ____.

A) $300 and $400
B) $200 and $400
C) $100 and $500
D) $266 and $334