Answer:
it is strong because it explain how the astronaut solved the fuel filter problem
Adding -s is the most common. for example: books, cups, pencils, etc. -es might have been the one that confused you, but that isn't a super common ending for plurals--instead, a more common one would be "-ies" which is when you drop the y (berry becomes berries, for example).
I believe the answer is Work Ethic:)
Hope this helps:)
@SamySamSamantha
