Which sentence correctly forms the plural of 1800? A. Were your great-grandparents alive in the 1800's? B. Were your great-grandparents alive in the 1800s? C. Were your great-grandparents alive in the 1800s'?
's
The reason is because when it indicates years it must have the apostrophe before the s
Answer:
A
Explanation:
The reason is because when it indicates years it must have the apostrophe before the s