Critical Reasoning

Hello, experts, members.

some articals in this forum advise us to find an assumption before an weakener. Other articles in this forum tell us that it is better to find an assumption before a going to answer choices.

my question is that

do we need to find an assumption before we go to answer choices for weakening/strengthening questions?

we always have to do find an assumption before going to answer choices or it it better if we realize the assumption before going to answer choices.

Pls, comment