题目下列四个算式：①4x2y2÷(14xy)=xy34x^{2}y^{2}÷(\dfrac{1}{4}xy)=xy^{3}4x2y2÷(41xy)=xy3；②16a6b4c÷(8a3b2)=2a2b2c16a^{6}b^{4}c÷(8a^{3}b^{2})=2a^{2}b^{2}c16a6b4c÷(8a3b2)=2a2b2c；③9x8y2÷(3x3y)=3x5y9x^{8}y^{2}÷(3x^{3}y)=3x^{5}y9x8y2÷(3x3y)=3x5y；④(12m3+8m2−4m)÷(−2m)=−6m2+4m+2.(12m^{3}+8m^{2}-4m)÷(-2m)=-6m^{2}+4m+2.(12m3+8m2−4m)÷(−2m)=−6m2+4m+2.其中正确的有()(\quad)()A.000个B.111个C.222个D.333个知识点：整式的除法章节：第16章 整式的乘法 / 16.2 整式的乘法
