Of course, you might also encounter resistance to any notion of "principles," "rules," or other hard and fast strictures that imply, "This is how you do it."_____________________________.
I've encountered that attitude throughout my careers in advertising, radio, and most recently television, where I wrote for the network sitcoms "Dinosaurs" (ABC) and "The Nanny"(CBS). In my tenure as a story editor and producer, I learned that all the creativity in the world wouldn't help you if you didn't understand the essential structure of the 22-minute sitcom. The best writers I worked with bent and broke the rules from time to time, but they did so knowingly. As T.S. Eliot once advised, "It is not wise to violate the rules until you know how to observe them."
That
comes with the territory wherever creativity is a major part of the job.
The word creativity in the line "I learned that all the creativity in the world wouldn't help you if you didn't understand the essential structure of the 22-minute sitcom” gives us a clue about what to look for in the options. The speaker's view is that everyone will encounter resistance in the form of rules or hard and fast strictures. He must understand the structure of the sitcom before he could do anything about it. This is expressed in option (a). Option (b) is irrelevant and is easily eliminated. Option (c) though representing the idea given does not really fit into the blank. Option (d) goes out of the scope of the passage. Hence option (a) is the correct answer.