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Matt is helping his younger sister learn about vowels and consonants. She wants to know how many vowels are in most words, so she and Matt count the number of vowels in each word on a page of a book that she is reading. Of the $18$ words on the page, all contain between $1$ and $3$ vowels. The mean number of vowels is $1.5$, and the mean absolute deviation is about $0.6$ vowels.$\newline$For words on this page, which is a measure of how much the number of vowels typically varies?$\newline$Choices:$\newline$(A)$0.6$ vowels$\newline$(B)$1$ vowel$\newline$(C)$1.5$ vowels$\newline$(D)$3$ vowels$\newline$