Which of the following regular expressions matches ONLY lines ending in exactly ".html"? (Select all that apply) (Write some code to test this).

1.(\.html)$

2.\.html^

3..html$

4.^(\.html)$

5.None of the answers are correct

6.(\.html)?$

7.(\.html)&

8.^.html$

9.^\.html$

10.\.html$