A gate function which occurs at t = t₀ and lasts for duration T can

1.	A gate function which occurs at t = t₀ and lasts for duration T can be written as
A.	u (t - t₀ - T)
B.	u(t - t₀) = u(t - t₀ - T)
C.	u(t - t₀) - u(t - t₀ - T)
D.	u(t - t₀) - u(t - t₀ + T)
Answer» D. u(t - t₀) - u(t - t₀ + T)

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