The correct answer is D) First tap the top of your head with your fist, and then proceed to use regular signals. This is the correct answer because the regulations for crane signal communication require the crane operator to be alerted before regular signals are used. Tapping the top of the head with a fist is the established signal to get the crane operator's attention before proceeding with the desired motion signal. The other options are incorrect because they do not follow the established protocol of first alerting the crane operator before giving the motion signal. Option A, B, and C do not include the required attention-getting signal.