甬狮y=x2-2x-3的图像与直线y=x+1交于A,B两点,则|AB|=( )
A <img width="55" height="20" src="https://www.beizhujiaoyu.com/uploads/202208/20190918212854_2123.png" > B 4 C <img width="38" height="21" src="https://www.beizhujiaoyu.com/uploads/202208/20190918212855_5873.png" > D <img width="34" height="21" src="https://www.beizhujiaoyu.com/uploads/202208/20190918212856_4466.png" ><br/>