Which sentence could be a line of programming code?

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The key idea is recognizing a concise conditional line that follows an if-else structure: a test with two clear branches for true and false outcomes. This sentence fits that pattern exactly. It states a condition—temperature is more than 30 degrees C—and then specifies two actions depending on that condition: if true, run the fan; if false, run the heater. The wording mirrors common code syntax where you choose actions based on a boolean test, all in one line.

The other options use natural language or describe different control flows. One uses a vague conditional without a clear else, another describes a loop-like behavior (continue until a condition and then do something), and another provides a condition without a true/false branch in a single, clean line. The line with the if-else structure is the cleanest, most code-like representation of a conditional action, which is why it’s the best fit.