单选题
电路搭建如图所示，当电位器从一端旋转至另外一端时，LED总共熄灭了4次，可能的程序为?
A.
analogWrite(6,analogRead(A0)/4);
B.
analogWrite(6,analogRead(A0));
C.
analogWrite(6,analogRead(A0)*4);
D.
analogWrite(6,analogRead(A0)%4);
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