The "default" rotation direction is Clockwise (option B)
When answering math questions in general, angles, etc are measured by moving in a clockwise direction. That is from the top-left towards the right until you come back to your starting point. This kind of mimics the movement of your clock. The hour, minute and second hands all move from the top (12 o clock) and goes in the right direction till it comes back to the left.and upwards back to the 12 o clock position.
As you must have noticed, the measurement of angles in geometry follows this default direction of measurement (except when the question measures in the other direction or requires you measure in the counterclockwise direction).