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A university's language professors incorporated a 10-week extensive reading program into a second semester Japanese language course in an effort to improve students' Japanese reading comprehension. Fourteen students participated in this reading program. Complete parts a through Click the icon to view the data table showing the number of books read by each student and the student's grade in the course. a. Find the range, variance, and standard deviation of the number of books read by students who earned an A grade. The range is The variance of the number of books read by students who earned an A grade is (Round to four decimal places as needed.) The standard deviation of the number of books read by students who earned an A grade is (Round to the nearest thousandth as needed.) b. Find the range of the number of books read by students who earned either a B or O grade The range is The variance of the number of books read by students who earned either a B or C grade is (Round to four decimal places as needed. ) The standard deviation of the number of books read by students who earned either a B or C grade is (Round to the nearest thousandth as needed.) c. Refer to parts a and b. Which of the two groups of students has a more variable distribution for number of books read? O A. B or C students O B. The two distributions have the same variability. O C. A students