Probably as old as human society, and defined as "the willful, malicio

Probably as old as human society, and defined as "the willful, malicious, and repeated following and harassing of another person", is stalking.

This is purely training on style. One cannot find any grammar problems in any of the choices. However, we can surmise that when one wants to explain 'Stalking', the sentence should start with the subject 'stalking' or ASAP.

A. Probably as old as human society, and defined as 2the willful, malicious, and repeated following and harassing of another person", is stalking. --- The defined subject is the last word in the sentence --- not vibrant.

B. Stalking is probably as old as human society and is defined as "the willful, malicious, and repeated following and harassing of another person". --- Gives priority to its ancientness rather than to its action. --- Out.

C. Probably as old as human society, the definition of stalking is "the willful, malicious, and repeated following and harassing of another person". We want to know about stalking and what it is rather than about its definition.--- Out

D. "The willful, malicious, and repeated following and harassing of another person" is the definition of stalking, which is probably as old as human society. --- this is vulnerable to the thought that the definition of 'stalking' is as old as human society.--- Out

E. Probably as old as human society, stalking is defined as "the willful, malicious, and repeated following and harassing of another person". -- I think this is in decent style.