Finish the following sentence with the best choice: To send a letter via the mail,

Choices:
- put the destination address in the middle of the front of the envelope and place proper postage in the top right corner.
- put the destination address in the middle of the front of the envelope and place proper postage on the back.

Answer:
put the destination address in the middle of the front of the envelope and place proper postage in the top right corner.