What teaching should the nurse provide the client regarding prevention of deep vein thrombosis when traveling by plane for a long period of time?

a) Encourage the client to stay seated and avoid moving their legs to prevent clot formation.
b) Instruct the client to drink plenty of caffeinated beverages to stay alert during the flight.
c) Advise the client to perform ankle and calf exercises regularly during the flight.
d) Suggest the client wear tight-fitting compression stockings to reduce blood flow.