The answer is group health insurance sorry if this is too late! Hope this helped
<span>The coronary sinus is the venous structure that does not empty blood into the right atrium. The coronary sinus is a collection of veins joined together to form a large vessel that collects blood from the heart muscle (myocardium). </span><span>It receives blood mainly from the small, middle, great and oblique cardiac <span>veins</span></span>. It also receives blood from the left marginal vein and the left posterior ventricular vein.
Energy balance refers to the relationship of energy intake to energy expenditure.
The correct answer is A.
Q: But how, also, why?
A:

Formula to the solution should explain everything. ^
They are caused by sexual contacts
and for AIDS specifically it can also be caused by mixing of blood, by contacting the blood of an infected person, or by mother's blood transfered to feotus
it can also be transmitted by sharing of syringes or needle s