The reason why the United states of America was concerned about the nuclear missiles in Cuba was that the missiles could be used to strike the United States. The correct option among all the options given in the question is option "c". The United States was also concerned that this could lead to a nuclear war and would badly impact USA.
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
We get tired after exercise because our muscle fibers get tired very quickly. This is due to the major source of energy for the muscle tissue, called adenosine triphosphate, or ATP. As the muscles make use of this supply of energy, they get tired and fatigue.
