Brian, an agent for clarion motors, inc., writes a letter on behalf of clarion motors to dina on november 1 stating that he will sell her a 2016 subaru outback for $20,000 between november 1 and december 31. brian’s letter to dina is

Brian's letter to Dina is a Merchants firm offer

Explanation:

A merchants firm offer is an offer by a merchant to sell goods, it is usually communicated via a signed writing. The offer remains open until the specific time duration which in this case is december 31.

on the first day of new student week, amber revealed to her roommate that she is a lesbian. this is an example of self-disclosure.