They are used as modifiers
If you are referring to the people Christopher Columbus found in America and incorrectly named them Indians (because he thought he had arrived in India), then the correct answer is Native Americans.
None of these. Because the formula V=d/t is is a well known law. It doesn’t need to have numbers to show and/or represent the formula for you.
1. (choice B) 500 ce. continuing
2. (choice D) a book called the history of the kings of Britain , and this
3. (choice C) cited
4. (choice C) many historians believe that the french poet chrétien de troyes was the original writer to introduce lancelot’s character into the romance of arthur and guinevere.
5. (choice B) was enduring