The frequency response of a first order system, has a phase shift with lower and upper bounds given by________________?
A. – ∞, π/2
B. -π/2, π/2
C. -π/2, 0
D. 0, π/2
A. – ∞, π/2
B. -π/2, π/2
C. -π/2, 0
D. 0, π/2