The correct answer is B) scrubber. In an inert gas system, the scrubber is the component responsible for cleaning the inert gas of solid and sulfur combustion products, while also cooling the gas. The scrubber achieves this by passing the inert gas through a series of baffles or plates, where the solid and sulfur particles are removed, and the gas is cooled through heat exchange with the scrubber fluid. The other options are incorrect because: - A) cooler is a separate component that cools the inert gas, but does not remove the combustion products. - C) purifier is a more general term that may include the scrubber, but does not specifically describe the component responsible for cleaning and cooling the inert gas. - D) filter is a component that removes solid particles, but does not cool the gas or remove sulfur compounds.