Ode - can you please explain the following problem?(p2, q6)

Let y: R > R satisfy the initial value problem y(t) = 1 y(t) where t e R and y(0) = 0. Then which of the following is correct ? (A) y(t,) = 1 for somet, e R. y(t)> - 1 for all t e R. (B) (C)yt) is strictly decreasing inR. (D) y is increasing in (0, 1) & decreasing in (1, o).