What transformation expresses the idea that his father's advice prevented him from becoming a record producer?

The correct transformation effectively captures the idea that the father's advice had a significant impact on the individual’s career path, specifically in preventing him from becoming a record producer. The phrase "Had it not been for his father's advice" suggests a condition where the absence of that advice would have led to a different outcome, leading to the implication that he might have succeeded in becoming a record producer. This construction effectively communicates the idea of regret and the significant role the father's advice played in steering his life in another direction.

In contrast, the other transformations do not convey this notion accurately. Some imply a condition that didn't exist or suggest alternate outcomes that are not related to the prevention of becoming a record producer. Overall, the chosen answer succinctly encapsulates the intended meaning, clearly linking the advice to the resulting career trajectory.