As the principal of a local high school, you want to install a wireless WAN to give students better, more secure access to the Internet. You request bids from a few local service providers to get the best price. This is an example of a auction.

Reverse Auction.

Explanation:

The main objective of reverse auction to form of the sale where buyers offer for their rates and we will sell the products and resources. In the reverse auction  the conventional buyer and seller roles are reversed order.

With the help of Reverse auction we will the head of  local high school and  created the wireless WAN to provide easier, more secure Internet connectivity for the students.

answer; i believe the correct answer is (a) all trenches must have access/egress;

answer; receiver;