【单选题】
如图所示,根据基尔霍夫电流定律,已知I<sub>1</sub>=10A, I<sub>2</sub>= -2A, I<sub>3</sub>=6A,I<sub>5</sub>=6A,则 I<sub>6</sub>为()<br /> <img src="https://nimg.ppkao.com/2019-05/tangling/201905141503098609.jpg?sign=899b7b3543c68bc9f7abb2391a9f36a4&t=62d6fbd7" /><br />
A、4A
B、-8A
C、-4A6
D、8A