In 1971, a memorial to Gus Grissom, Ed White, and Roger Chaffee was left where?

A1 - At the North Pole
B2 - On the moon
C3 - Top of Mount Everest
D4 - In the Pacific Ocean


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...On January 27, 1967, tragedy struck on the launch pad at Cape Kennedy during a preflight test for the mission that would be known as Apollo 1. The mission was to be the first crewed flight of Apollo, and was scheduled to launch the next month. Astronauts Virgil Grissom, Edward White and Roger Chaffee perished when a fire swept through the command module, becoming the first Americans to die in a spacecraft. In 1971, the Apollo 15 mission left a plaque on the Moon containing the names of the Apollo 1 astronauts, along with two Soviet cosmonauts, who perished in the pursuit of human space flight.

Also -

On February 4, 1922, Lincoln Motor Company was acquired by Ford Motor Company for $8 million. Lincoln became the luxury vehicle division of the American auto company Ford. Henry Ford had previously designed several luxury vehicles within the Ford name but wanted to have a standalone luxury brand to make them under. Thus, the Lincoln brand was born and has been Ford's exclusive luxury brand ever since. Lincoln Motor Company was founded in 1917 by Henry M. Leland, who named it after Abraham Lincoln, stating that Lincoln was the first President for whom he ever voted (1864).