Question

q: if a church was built one millennium ago, it:
a. is one thousand years old
b. is ten thousand years old
c. is one hundred years old
d. im not sure

Explanation:

A millennium is defined as a period of one thousand years. So if a church was built one millennium ago, it has existed for one thousand years, meaning it is one thousand years old.

Answer:

a. Is one thousand years old