What is the definition of the suffix -ory?

An affix occurring at the end of a word, base, or phrase

Explanation:

hancock was president of congress when the declaration of independence was adopted and signed. he is primarily remembered by americans for his large, flamboyant signature on the declaration, so much so that "john hancock" became, in the united states, an informal synonym for signature.

explanation:

your answer would be: d) eye contact