I can't express enough how correct mbenet is in his statement :
"Instead, before answering try to reason why the other options are not correct..."
The REASON why you should select an answer is the key to understanding. Most questions (like life) won't be "which if these is factually correct", instead you will face choices where every choice COULD be acceptable with variable consequences.
When you choose to go to the store from your home, you have choices. You might choose to drive your car because you will have to carry groceries, or it is far away. You choose which route to take to get there. All of these choices have VALID reasons. That isn't to say it couldn't be done some other way, but you validate your reasoning in such a way to say the method you chose is the BEST.
The same is true on the CISSP Exam. Knowing WHY an answer would be BEST, WORST, etc is where the "think like a manager" concepts come from.
I hope that helps.
do not give up!! Keep going!
My only advice is to use CRITICAL thinking, analyze the material and think what you WOULD do as a manager.
Go back to the BASICS, and do not overthink the exam. and DO NOT memorize but understand the materials