The correct answer is: C. Mountainous
The word "mountainous" is an adjective that means "having many mountains." It is derived from the noun "mountain," which is a large landform that rises significantly above the surrounding land. The word "mountainous" is often used to describe landscapes, such as the Rocky Mountains or the Alps. It can also be used to describe objects, such as a mountainous cake or a mountainous pile of laundry.
The other options are incorrect because they are not spelled correctly. The word "mountaineous" is misspelled, and the words "Mountaneous" and "Mountanous" are not real words.
I hope this helps! Let me know if you have any other questions.
