If it cannot perform basic or normal tasks is has reached an unsafe level of fatigue
Electrocardiography (EKG) can be measured both noninvasively with electrocardiogram (and it's the most common, totally safe and painless method), as well as invasively with implantable loop recorder (used in extraordinary circumstances).
I would say the answer is D.
A lot of kids at party's drink heavily, Some don't drink and others drink moderatly
Business math so she can make money and do business
