If $-1<a<0, q=a-1, r=a^2,$ and $s=a^3,$ then which of the following is true?

If $-1<a<0, q=a-1, r=a^2,$ and $s=a^3,$ then which of the following is true?

A. $q<r<s$

B. $q<s<r$

C. $r<q<s$

D. $s<q<r$

E. $s<r<q$

Answer: B

Source: Princeton Review

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