A. 0 ≤ r ≤ 1
B. 0 ≤ r ≤ -1
C. -1 ≤ r ≤ 1
D. 1 ≤ r ≤ 0
Correct Answer: -1 ≤ r ≤ 1 ✔
Last Updated: October 05, 2021
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