Answer:
Both Ryan and Brady are planning careers in journalism.
Step-by-step explanation:
Both ... and: With this correlative conjunction you need to use a plural verb.
Wrong options:
For anyone who wishes to do the work, writing are a satisfying and rewarding career. (should be is, not are)
Documentary writing, speech writing, textbook writing, and book review writing is just a few of the possibilities. (should be are, not is)