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Question 25·Easy·Text Structure and Purpose

In 1902, inventor Mary Anderson visited New York City during a snowstorm and was struck by how often trolley drivers had to lean out of their vehicles to wipe snow from the windshields. Back home in Alabama, she sketched a hand-operated blade that could be attached to a car’s windshield and cleared from inside the vehicle. When Anderson presented the idea to automobile manufacturers, they were skeptical. They believed drivers would find the rhythmic motion of a mechanical blade distracting and would prefer to stop and clean the glass manually. Undeterred, Anderson patented her device, and within a decade automatic windshield wipers had become standard on cars.

Which choice best describes the function of the underlined sentence in the passage?