Question

Which sentence correctly forms the plural of 1990? A. My older brother was born in the 1990's. B. My older brother was born in the 1990s'. C. My older brother was born in the 1990s.

Answer 1

The only sentence from the list of options that correctly forms the plural of 1990 would be "A. My older brother was born in the 1990's" since an apostrophe is needed. 

Answer 2

Answer:

C. My older brother was born in the 1990s.

Explanation:

Though apostrophes can be used with number figures and signs, they are not necessary and are not the commonly accepted form.