Many successful graphic designers began their careers after years of formal training, although a significant number learned their trade more informally on the job. But no designer ever became successful who ignored the wishes of a client. If all of the statements above are true, which one of the following must also be true? ['All graphic designers who are unsuccessful have ignored the wishes of a client.', "Not all formally trained graphic designers ignore clients' wishes.", "No graphic designers who learn their trade on the job will ignore clients' wishes.", "The more attentive a graphic designer is to a client's wishes, the more likely the designer is to be successful."]