I think it would be A. Cardio means to get your heart rate pumping so aerobic training is the best choice. Hope this helps.
I do not know for sure but i believe the answer is pulse
A . Plumbing is the correct answer. Biology is a science, English is a language, Physical education is a more or less a co-curriculum subject. Plumbing is an artisan, its more involving and needs training to perfect in such an art.
