Rachel’s ( ) behavior made her friends think she was hiding something.

Hello! The answer should be something along the lines of 'suspicious,' or 'elusive.'

Explanation:

If her friends believe Rachel is hiding something, then her behavior has to be suspicious, in order to make them think she's hiding something. Her behavior's elusive and suspicious, and so those - or synonyms of those words - are going to make her friends suspect something of her.

well basically since ima beginner people will answer any subject "right away"and if you get more points you could ask more questions or if you answer someone's question you get points