When two LTI systems with impulse responses ha (t) and hb (t) are cascaded then equivalent response is given by

• A. h(t) = ha(t) + hb(t)
• B. h(t) = ha(t) – hb(t)
• C. h(t) = ha(t) hb(t)
• D. h(t) = ha(t) * hb(t)