Multi-select problem: How does the next paragraph end?

A man is on top of the roof talking about how to work up there using certain tools and putting them under the shingles. He was able to get one out from underneath and then begins to press down on some metal. he

OPTIONS: [I] is finally able to get a decent metal plate installed on the aluminum siding. [II] is talking about how to use these tools and how to install them to the roof. [III] scrapes a bar of the wood down over the piece of metal and shows it off afterwards. [IV] gets a hammer and begins to nail it in place and then he cuts off the excess.
[IV]