What happens next in this paragraph?

How to become a biochemist
Get a good foundation in the sciences.
In high school, you should take classes in all the sciences that you can, especially the natural and physical sciences (like biology and chemistry). These classes will function as the basis of your professional learning in the future and will prepare you to begin your degree in biochemistry once you start learning at the university level.
Available choices:
(A). You will also need to get into your field and get into a good school. Find an institution with a whole lot of good teachers and don't be discouraged if the first one you find's taking business or credit courses.;
(B). Also try to study the subjects you will be required to go to graduate school in, such as biochemistry and chemistry. Make sure you really think about what high schools will have you most in mind.;
(C). All science-related fields will be helpful at this point. Make sure you take biology, chemistry, physics, zoology, microbiology, organic chemistry, and any other science-related classes you're able to take.;
(D). These courses are often taken online after college. They are not legally required in all states.;
(C).