Answer to Question 1
ANS: B
The autoimmunity theory holds that with aging, the body becomes less able to recognize or tolerate the self. As a result the immune system produces antibodies that act against the self.
Answer to Question 2
ANS: C
Only one new food should be introduced at a time, followed by several days between new foods. Cereals should be introduced first, followed by fruits and vegetables, and last meats. Food should not be mixed to allow the infant to develop interest in different foods and tastes.