First of all, you are fundamentally wrong.
That couple had fundamentally different ideas about their kid's education.
Kristen doesn’t eat bacon; where do you think the root of this problem lies?
The root origin is the root of something. Possibly even more root than root, but we'll stick with root.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. Careful, 本 is ぽん, which is a weird rendaku.