Answer: A. Par
Step-by-step explanation:
While US Government bonds are usually sold at auction which means a price different from Par, Federal Agency bonds operate much like Corporate Bonds in their selling procedure. They engage a group of Underwriters called a Selling group which can be made up of large banks and brokers.
These underwriters will then handle everything that have to do with the sale and sell it to the public. Like a Corporate listing, they get a commission from this.
Because of this direct sale by the Underwriter to the public, the Public is most likely to get the offering at Par.