A seven-day driving cycle ends and a new one starts only after a driver takes: a) 72 consecutive hours off duty/ sleeper berth b) 24 consecutive hours off duty/ sleeper berth c) 34 consecutive hours off duty/ sleeper berth d) 36 consecutive hours off duty/ sleeper berth e) 24 consecutive hours on duty/ driving f) 44 consecutive hours off duty/ sleeper berth