Passage Summary: You can go to school or learn on the job to be a designer, but if you don't listen to your clients, you'll never be successful.

Reasoning: Success in graphic design can come from different educational backgrounds, but it strictly requires following client wishes.

Analysis: This is a classic conditional logic setup. The stimulus establishes a necessary condition for success: if you are a successful designer, then you did not ignore the wishes of your clients. The contrapositive is also true: if you ignore the wishes of your clients, you will not be successful. When looking for the 'Must Be True' answer, focus on these conditional links and avoid any choices that try to make the 'informal' or 'formal' training a requirement for success, as the text presents those as mere possibilities.