In order to have their beliefs considered as public opinion, people must –
agree with other people
understand important issues
read about public affairs
express their views

In order to have their beliefs considered as public opinion, people must – express their views.

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation:

b, the anti immigrant fervor