This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to be an effective supervisor
Have faith in yourself.
One of the worst things you can do as a supervisor is to doubt your own abilities. If you're new to supervising others, recognize that you will probably make some mistakes along the way, but that does not mean you are not a good leader.

OPT: (a). Cut yourself a little slack, but then commit yourself to doing the best you can. Keep in mind that you were hired to be a supervisor because your boss believes that you are capable of doing the job! Now you just have to prove your boss right.; (b). You can learn to live with your mistakes. Actually, if you're new to managing people, you will just need to branch out a bit.; (c). An important part of being effective is not that you don't believe in your abilities, but that they perform the work well and actually do something you want to do. While it's important to make your own improvements, don't let these shortcomings outweigh your strengths.; (d). Your job as a supervisor is to understand your abilities or spend time doing them. Open communication means by thinking about the things you want to say before making any necessary appointments or events.;
The answer is:
(a).