A person who selling something often to other business

Explanation:

a person in a store who helps customers and sells them things in the store is called a salesclerk or a clerk

A vendor

Explanation:

A vendor is a person or a company that sells something. People who are vendors usually sell their products at stalls or booths in stadiums or fairgrounds. Companies who are vendors usually sell their products directly to other companies. We buy our all our office supplies from the same vendor.

the answer is definitely option c. "sonnet xxxi best illustrates the division. in the octave, the poet observes that the moon is in love. in the sestet, he gives his reaction to the fickleness of woman's love."