Why does the author share problems and solutions to organize the article? Pick two choices.

​

a.
​to explain the cause of food storage problems

b.
​to explain that there is more than one way to store food

c.
​to describe the best way to store food so that it is preserved

d.
​to describe how food storage problems can be solved step-by-step

e.
​to show that people have been trying to solve this problem for years

f.
​to show that food storage is not needed as often as most people would think