Explanation is in a file
(C).Give her advice and tips for how to get things done correctly and efficiently.
Question is: What are you most likely to do.
Every job has tricks that enable the employees to work more efficiently and thus be more productive. As the newest co-worker however, she may not know these tricks so does not know how to be as productive as the rest of you.
Best thing you can do is to give her advice and tips on how to be more productive in the company and hope that she takes it because that will be good for you and your co-workers as it will reduce your stress.
a likely b least
The correct answer would be option C.
If there is a new co worker hired in my office, and its her beginning days, and I, along with other team members see that she is not as productive as other members of the team are, and we all have to work more and harder to make up for her work. So i would preferably give her advice and tips for how to get things done correctly and efficiently. I would not like to get her out of the office, rather i will try to make her understand the things as soon as possible and give her tips to increase her work efficiency. But if the problem continues, and I believe that she will not be able to cope up with us, then i will talk to the supervisor and suggest him that she might not be the best role for us. But i will go with option C.