下图所示电路中,使<img src="https://nimg.ppkao.com/2018-08/yuanhao/2018082411465229301.jpg?sign=cdf63a55cf6e65d9a0e741c4a1a917a7&t=62d514c5" />的电路是()<br /> <img src="https://nimg.ppkao.com/2018-08/yuanhao/20180824114704968.jpg?sign=a59915425be47543464f32a4b3435832&t=62d514c5" />
A、①
B、②
C、③
D、④