This is a question with answer options. What kind of thing would the answer to the question "How long should a person wash their hands before they are clean ?" be an entity, an abbreviation, a description, a human, a location, or a numeric value?

Possible answers:
(i). description;
(ii). entity;
(iii). abbreviation;
(iv). human;
(v). numeric;
(vi). location;
(v).