The incidence of polio, mumps, and tuberculosis has been reduced ...

[krzymel]

The incidence of polio, mumps, and tuberculosis has been reduced because
 
  A. people are healthier and don't get these diseases as easily.
  B. the viruses and bacteria causing these diseases have become very weak.
  C. of the use of vaccines and antibiotics.
  D. doctors are able to isolate the carriers.

Question 2

One of the reasons that adolescents have poor intakes of calcium and vitamin D is that
 
  A. they drink soda instead of milk.
  B. they eat a lot of sweets.
  C. they don't eat the recommended amount of vegetables.
  D. their diets are high in trans fats.

[paavo]

Answer to Question 1

C

Answer to Question 2

A

[krzymel]

TYSM

[bdobbins]

Gracias!