Which controversial cartographic decision did National Geographic make in 1988 that fundamentally changed how their maps represented the world?

National Geographic has been a leader in geographic education and cartography since its founding in 1888. Over the decades, the organization has revolutionized how we visualize and understand our world through innovative maps, atlases, and globes. This trivia question explores a significant turning point in the brand's cartographic history that changed how millions of people perceive our planet.

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They adopted the Peters projection, which more accurately represents land area proportions compared to the traditional Mercator projection
They began coloring oceans blue instead of white, setting a new standard for world maps
They started placing North America on the right side of world maps instead of the center
They began including disputed territories with dotted boundary lines rather than solid ones