I’ve ran into a couple people lately who are having issues at work and it doesn’t seem like they speak up. They are scared that doing so will cause them to get fired.

I’ve seen this in the past and have yet to experience this cause them to get fired.

My advice is to be genuine and open. Be prepared to be wrong the supervisor/manager may have other information that could change the situation/scenario. But do your homework, think more than just your stance, come up with pros/cons for 2 or 3 different solutions and give your reasoning why you chose what you did.