根据一阶线性微分方程的通解公式求解，则下列选项正确的是（　）．

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/2-3/image090.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/2-3/image091.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/2-3/image092.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/2-3/image1000.png" alt="" align="middle">