When considering the acute responses of arm versus leg exercise, which is true?

At the same absolute workload, systolic blood pressure is actually higher with arm exercise, not lower, due to the smaller muscle mass causing a greater pressor reflex and less peripheral vasodilation.

Diastolic blood pressure is higher (not lower) with arm exercise at the same workload, reflecting greater peripheral vascular resistance when a smaller muscle group is stressed.

At peak workload, systolic blood pressure is not reliably greater with arm exercise; peak leg exercise can produce equal or higher systolic values because of the much higher achievable cardiac output.

Because the legs contain a substantially larger muscle mass than the arms, peak VO2 during maximal leg exercise is greater than during maximal arm exercise. The larger active muscle volume allows for greater total oxygen extraction and a higher cardiac output ceiling, making peak VO2 consistently higher with leg work.