Vieillis donc, B est la réponse :)
I think you make a proof just like the other above. I took geometry a year ago and don't remember all the properties, just ignore tge word problem and make a regular proof just like with a regular triangle.
Answer:
A!!! <u><em>il y a</em></u><u> 6 livres dans mon sac.</u>
English Translation:
There is 6 books in my bag.
