Identify all separable differential equations in the list below (this may require you to make more than one choice). A. (r)+siny(r) = ry(r) B. y'(r)+siny(r) = r C. (r) (sin r)y(x) = y(x) + D.y(r)+(sinr)(s(z)) = 1 E. (r) + (sinr) (v(z)) = 0