<u><em>2.Church officials had little power and no land.
</em></u>
That is not true. When it comes to the Catholic Church, they were rich and had plently of land.
<u><em>3.People often moved into higher social classes.
</em></u>
This was incredibly rare. Most people stayed in their class until their last day.
<u><em>4.Barons were at the top of the social hierarchy.</em></u>
Barons were still under plenty of people, including royalty.
The answer is:
1.People were born into a social class
People would be born a noble or a commoner back in that time.