MCQ Practice Question Signals & SystemsLTI Systems For a causal continuous-time LTI system, h(t) must be zero for? At>0 Bt<0 Ct=1 only DAll t Show AnswerHide AnswerReport an error Correct Answer: B. t<0 Explanation: Causality requires h(t)=0 for t<0.Reference: Standard signals and systems: lti systems