Honestly, nothing will beat the actual curriculum especially when it comes to ethics in my opinion. I know it’s hard to get through but it’s the final stretch and I think you can realistically tough it out if you’ve made it this far.
It is somewhat unusual to me that people make these type of questions on L3 sub-forum. You have made it this far, and are going to read the material for at least the third time. What is the fuss? This should be the easiest portion of the exam.
Ethics on the exam was really difficult. Although material is the same, the way ethic questions were asked was brutal and having read CFAI ethics for a third time didn’t help (L1 and L2 always passed with > 70%)