Few people know about the (complex) science behind the construction of elevators.


(my answer) demonstrative adjective
interrogative adjective
indefinite adjective
proper adjective

To be honest, I'm really not sure! I know (complex) is an adjective, I just don't know which kind. Thank you so much fro all of you help :)

5 answers

I don't think any of your choices is right.

A demonstrative adjective is a demonstrative pronoun used as an adjective.

http://www.usingenglish.com/glossary/demonstrative-adjective.html

It certainly isn't interrogative or proper.

But here's the definition of an indefinite adjective -- again derived from a pronoun.

http://www.grammar-monster.com/glossary/indefinite_adjectives.htm

Please check with your teacher to see if this question is in error.
Its an automated question checked by a computer, so I'm not sure. My teacher didn't say anything about their being an error but a lot of the question in our course that are worded oddly. This question really confused me, I tried looking in our text book but nothing seemed right.

Should I just put demonstrative and see what happens? Or is there a better option among the answers?
I don't see a better option.

I see a lot of bad questions and wrong answers in these for-profit online schools. I hope that you can transfer to a real school with real teachers.
Um ms SUEE this is A REAL SCHOOL WITH REAL TEACHERS, many other schools have such mediocre teaching methods, and i think online schools put alot of thought and flexibility, i have been homeschooled this year and i had done a loy of work my teachers ARE REALLY GREAT AND THEY ARE REAL , so please dont bother.
* A LOT of work