The word "many" is the simple subject in the sentence "There are too many people in the elevator". The correct option among all the options given in the question is option "A". In the given sentence we can already see that word "people" is a direct object and the word "elevator" is the indirect object. This makes our choice practically very easy and it is "many".
Although the sentence”There are too many people in the
elevator” seems to be easy but finding the simple subject can be a bit tricky.
Hopefully this clarification will help you.
