Public opinion turned against all labor unions
That is definitely a matter of opinion.
very uncommon
A good claim that states your opinion/fact, strong evidence that supports your claim, and reasoning that shows a link between the claim and evidence. The most important parts, in my opinion, are the reasoning and evidence, but the claim is important too. After all, the claim is the base. The evidence is the top, and the reasoning is all the details that make it interesting and worthy of of attention.
It is both arguable and defensible.
The question asks for an opinion. You have to form an opinion for yourself.
Public opinion turned against all labor unions
Public opinion turned against all labor unions
Public opinion turned against all labor unions
Public opinion turned against all labor unions
When you claim that a class was boring it is your personal opinion and not a fact.
making a claim or expressing an opinion.