This is a predicate adjective, as it immediately follows a copulative (=linking) verb "to grow". If it said - The tall grass, then "tall" would be nominative. This way it isn't, it is a predicative adjective.
This is false. I hope this chart helps you :)
Explanation:
Am I the only person that is here just for the points? But I dont get the question, confused
It's probably too late but the answer would've been "A" i'm pretty sure