Write the next sentence in the following story.

How to build different types of solar ovens and dehydrators
Decide how it will be used.
Will it be used for a hobby or is it for actual family food preparation? Emergency situations can occur anytime and without warning. Being able to prepare food is one of the primary survival skills everyone should know, at least the basics to sustain life.

Select from:
a). You can choose a type of solar oven or allow yourself to manually do the job. Go to https: // www.dmvc.gov/basic-sun/solar-oven/use /.;
b). If nothing else, trial and error can stave off equipment crashes, injury, complications and suicide. Laptop computers are also useful, but their functions vary widely.;
c). Determine whether you are willing to build solar ovens commercially or to just eat it. Either way, you will have to decide which way is the healthiest for you.;
d). Determine the size unit you need for your purposes. The larger the unit, the more food that can be cooked.;. The answer should be
d).