What happens next in this paragraph?

How to get to get fda approval to market a medical device
Determine the classification of your medical device.
There are 3 classes: class i, ii, and iii. They are classified based on risk, with class i being the lowest and class iii being the greatest.
Available options: (a). You will find out what pre-marketing submission is required by fda based on classification of your device. General controls are assigned as class i either with or without exemptions.; (b). Ii is considered the biggest (least common of the 3 classes), and iv is considered the weakest (most common in aids which comes under administration of the drug). Iii is considered the smallest (by clinical examination only), though it occurs to larger numbers of people.; (c). Class ii is designed for normal people under 0.5. Iii is designed for people under 2 years of age.; (d). Classes ii and iii are on the higher ranks because you can offer better equipment, more medical devices, and anyone you wish. Class iii is faster and easier to use than ii or iii but is also more expensive.;
(a).