Dropping small hints to let this employee know that his or her behavior is bothering you.

The statement has to be classified as very effective or very ineffective.

The correct answer is:

Very ineffective

Explanation:

The word effective means "something that results in the desired effect", therefore, ineffective means the opposite "something that does not result in the disired effect".

In this case, the desired effect is to modify the employee's behaviour. If we as employers drop small hints about what is bothering us, the employee may not be able to understand what we mean, and continue behaving in the same manner.

It is more effective to have clear, straightforward communication in the workplace. If an employee behaviour is bothering us, we should simply communicate it in a direct and respectful manner.