which of the following statements about the use of radioisotopes to irradiate foods is not true?

a)    it is a food safety technique

b)   it does not  contaminates the food

c)    he food nutritional value is essentially unchanged

d)   it eliminate diseases causing agents

e)    the food is radioactive

f)     frozen foods takes larger radiation to kill microbes

g)    all of the above

h)   none of the above