When writing a routine letter requesting information and action

a$.$ close with a justification of your request.

b$.$ close with a clear statement of your reason for writing.

c$.$ close with a specific account of what you expect and a deadline.

d$.$ do none of the above.

A claim letter should open with

a$.$ an emotional statement demanding a settlement.

b$.$ a straightforward statement of the problem.

c$.$ an explanation of details of the situation.

d$.$ none of the above.