”If his latest movie had been a commercial success, the actor would have made enough money to sponsor his next movie.” Based only on the above sentence, which one is TRUE?

The correct option is: "His latest movie wasn’t commercially successful"

Let's break down the logical reasoning step-by-step to understand why this statement must be true based on the given sentence:
The sentence uses a conditional structure known as the third conditional (or past counterfactual): "If his latest movie had been a commercial success, the actor would have made enough money..."

In English grammar, the third conditional is used to describe a hypothetical situation in the past and its imaginary result. The use of the past perfect tense ("had been") in the "if-clause" and the conditional perfect ("would have made") in the main clause indicates that the condition did not actually happen.
Specifically:
1. The clause "If his latest movie had been a commercial success" implies that, in reality, the movie was not a commercial success.
2. The clause "the actor would have made enough money..." implies that, in reality, the actor did not make enough money.

Therefore, based strictly on the grammatical structure and meaning of the sentence, we can definitively conclude that the event did not occur. Thus, the statement "His latest movie wasn’t commercially successful" is TRUE.