Read part of a letter. 1492 Columbus Lane
Tacoma, WA 90221
April 12, 2013

To Faculty and Staff:

The Safety Club recommends that a "Buckle Up for Safety" sign be displayed in the parking lot near the parent pickup exit. The free signs are donated by the state highway patrol, and their volunteers will erect the sign in the designated location upon request. This would serve as an extra reminder for busy parents and students as they leave the school to drive home. Please consider making this valuable improvement.

Which best describes the type and purpose of this letter?

It is a friendly letter written to make future plans.
It is a persuasive letter written to offer information.
It is a persuasive letter written to suggest a change.
It is a friendly letter written to express thanks.