The correct solution is 1.
RATIONALE: The symptoms indicate arterial insufficiency leading to complaints of intermittent claudication. The Ankle-Brachial Index measure (ABI) measures the extent of peripheral arterial disease (PAD), and intermittent claudication is a common symptom that coincides with PAD. Exercise studies provide an objective measure of intermittent claudication and, when performed alongside an ABI, give a clear indication of arterial insufficiency and blood pressure responses to exercises.