The correct answer is C, because:
With A, removing the lab coat wouldn't have helped her in eyes in any way. So immediately, we can rule that out.
With B, it's literally the same thing as A. It's not going to help her eyes in any way.
With C, she should have removed her contact and then rinsed her eyes out because then she would be 100% sure that everything is out of her eyes.
With D, if she were to wipe her eyes with her gloves, whatever is on her gloves can get into her eyes.