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Which is the most accurate way to estimate $66\%$ of $91$?$\newline$Choices:$\newline$(A) $\frac{2}{3} \times 93$$\newline$(B) $\frac{1}{2} \times 93$$\newline$(C) $\frac{2}{3} \times 90$$\newline$(D) $\frac{1}{2} \times 90$