The correct answer is B.
People over the age of 65 should be as physically active as their health and bodies allow. Everyone ages differently and some will be more able to do higher intensity exercise while others will be able to do low or moderate. Completely depends on the person.
5-10 I would say is the reasonable amount of yine
Monogenetic disorders are caused by a mutation in a single gene. The mutation may be present on one or both chromosomes (one chromosome inherited from each parent). Examples of monogenic disorders are: sickle cell disease, cystic fibrosis, polycystic kidney disease, and Tay-Sachs disease.
You answered it. It says a=5