Here is a goal: To slice cookie bars in a pan,

How would you accomplish this goal?

Select from the following.
A). using a chef's knife, press down into the cookie bars until you feel it slice through to the pan, making horizontal and vertical lines of equal distance across the pan.
B). using a chef's knife, press down into the cookie bars gently to cut through the top layer, making horizontal and vertical lines of equal distance across the pan.
A).