My syllabus is no longer updating as I progress through the course: I am having to manually put the green check next to it. Does anyone know how to fix this?

Anybody know why the correct Answer choice B weakens the argument??I just can't seem to see how communal objects being passed down from one generation to the next weakens the argument.

https://classic.7sage.com/lsat_explanations/lsat-73-section-2-question-19/