Select the equivalent expression. \left(5^{4}\cdot b^{-10}\right)^{-6}=?(5 4 ⋅b −10 ) −6 =?left parenthesis, 5, start superscript, 4, end superscript, dot, b, start superscript, minus, 10, end superscript, right parenthesis, start superscript, minus, 6, end superscript, equals, question mark Choose 1 Choose 1 (Choice A) A \dfrac{b^{60}}{5^{24}} 5 24 b 60 ​ start fraction, b, start superscript, 60, end superscript, divided by, 5, start superscript, 24, end superscript, end fraction (Choice B) B 5^{4}\cdot b^{60}5 4 ⋅b 60 5, start superscript, 4, end superscript, dot, b, start superscript, 60, end superscript (Choice C) C 5^{24}\cdot b^{60}5 24 ⋅b 60 5, start superscript, 24, end superscript, dot, b, start superscript, 60, end superscript