Which sentence from the passage expresses an opinion rather than a fact? "The feudal system relied on serf labor to survive"
"The feudal system relied on serf labor to survive"
"Relationships between each level of society relied on the exchange of loyalty and services"
"Relationships between each level of society relied on the exchange of loyalty and services"
"In addition to the labor and taxes that the serfs provided to the lords, serfs also gave their lords the extra harvest to pass along to their landlords"
"In addition to the labor and taxes that the serfs provided to the lords, serfs also gave their lords the extra harvest to pass along to their landlords"
"Although serfs provided the manor with an important source of money and labor, it is important to remember that their lives were full of hardship

I think it is "Although serfs provided the manor with an important source of money and labor, it is important to remember that their lives were full of hardship"  

Explanation:

a.) d-day invasion of normandy.

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the first 10 amendments to the u.s. constitution are known as the bill of rights. those 10 amendments establish the most basic freedoms for americans including the rights to worship how they want, speak how they want, and assembly and peaceably protest their government how they want. the amendments have also been subject to much interpretation since their adoption, particularly the right to carry a gun under the second amendment.

"a bill of rights is what the people are entitled to against every government on earth, general or particular, and what no just government should refuse, or rest on inference," said thomas jefferson, the author of the declaration of independence and the third president of the united states.