The function (sin x)/x

• A. has a period 2p, decays with increasing x and has zeros at np, n = ¬± 1, ¬± 2
• B. has a period p
• C. has a period p/2
• D. has a period 2p, decays with increasing x, is an even function and has zeros at np, n = ¬± 1, ¬± 2