Answer:
B. Because he had soon designed several toys of his​ own, and he had also done many kinds of book​ illustrations, he was able to sell his work to other toy companies.
Explanation:
Subordination refers to how two clauses in a sentence are joined together where on clause is dependent on the other.
Coordination refers to how two clauses, phrases or words in a sentence are given the same emphasis. This is usually done by using: and, but, for, or, not, yet and so.