His views on children and their upbringing are indeed outlandish.

Answer: Option C

Realistic : having or showing a sensible and practical idea of what can be achieved or expected.
Funny : causing laughter or amusement; humorous.
Strange : unusual or surprising; difficult to understand or explain.
Offensive : causing someone to feel resentful, upset, or annoyed.
Outlandish : weird; queer.

Synonym of Outlandish is Strange