The solution of the differential equation $e^{-x}(y+1) dy + (\cos^2 x - \sin 2x) y dx = 0$ at $x=0, y=1$ is

  • A
    $(y+1) + e^x \cos^2 x = 2$
  • B
    $y + \log y = e^x \cos^2 x$
  • C
    $\log(y+1) + e^x \cos^2 x = 1$
  • D
    $y + \log y + e^x \cos^2 x = 2$

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