Final answer:
The refractive power of the magnifying lens is most responsible for allowing it to magnify the newspaper type.
Step-by-step explanation:
The property of the magnifying lens that is most responsible for allowing it to magnify the newspaper type is refractive power. Refractive power refers to the ability of a lens to bend light as it passes through, which results in the magnification of the object being viewed. The greater the refractive power of a lens, the larger the magnification.