A 67-Year-Old Patient States That He Recently Began Experiencing Pain

A 67-year-old patient states that he recently began experiencing pain in his left calf while climbing the 10 stairs to his apartment.This pain is relieved by sitting for about 2 minutes;then he is able to resume his activities.This patient is most likely experiencing:

A) claudication.
B) sore muscles.
C) muscle cramps.
D) venous insufficiency.