The correct answer is B.
Diet books and supplements cannot guarantee long-term success. For starters everyone is different and what might work for one person might not work for another. Diet books tend to be a mixture of personal opinion and healthcare facts and it's difficult to know what to completely trust. Most of the books and supplements tend to be based on current trends also and many have turned out to be inefficient.
Answer:
The reason is because the heart requires more oxygen when exercising. Several physiological events happen to increase the blood flow and therefore oxygen flow to that muscles,including the heart.
Also the volume of blood that the heart pumps out is maintained so that the body organs receive the necessary amount of oxygen and nutrition, because if it didn't adjust the flow of blood to match activity level, you will be insufficient. Either output method will be lower than needed.
The Giver is a 1993 American younger grownup dystopian novel by using Lois Lowry. It is set in a society which at first seems to be utopian however is printed to be dystopian as the story progresses. The novel follows a 12-year-old boy named Jonas.