Which of these claims is based on personal preference?

The funding of national parks is important, because they provide many Americans with the opportunity to see wildlife in its natural habitat.
National parks should be funded by public money, because they are really nice and fun places to visit.
Funding national parks with public money should be supported, because it is difficult to generate enough private money for this cause.
Millions of tourists visit national parks every year, so the public money spent on their maintenance is a wise investment.