Question

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'?

Answer 1

Any ideas ?

Answer 2

c

Answer 3

C is Incorrect, Any other ideas ?

Answer 4

its b

Answer 5

"1800's" there's never an apostrophe in front of the "s" , its incorrect in the English language. B is Correct