Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(A & D) x 40 magnifications; (B) x 100 magnifications; (C) x 200 magnifications; (E) x 400 magnifications.
