单选题
Arduino UNO/Nano主控板，电路搭设如下，下列选项中，实现按键开关按下后，LED点亮的程序段是（ ）
A
if(digitalRead(11) == 0)
digitalWrite(4, HIGH);
B
if(digitalRead(11) == 1)
digitalWrite(4, HIGH);
C
if(digitalRead(11) == 0)
digitalWrite(4, LOW);
D
if(digitalRead(11) == 1)
digitalWrite(4, LOW);