Which passage from the Article best supports the idea that the study of lunar rock samples
can help scientists gain a better understanding of the moon?
A. The samples were sealed on the moon. They were then kept frozen or stored in
gaseous helium after splashdown. Some of the samples were broken into smaller
pieces. Some were loaned out. These samples were used for research or put on
display.
B. NASA astronauts touched down on the moon in the late 1960s and early '70s. And
they were like visitors to a family theme park. They brought back souvenirs. In
fact, these moonwalkers hauled home what they moonwalked on: rocks, pebbles,
sand, and dust from the moon's surface.
C. The space agency's timing was on point: 2019 marked the 50th anniversary of Neil
Armstrong and Buzz Aldrin's famous Apollo 11 moonwalk. This was the first lunar
landing. And it was only the start of NASA's lunar rock collection.
D. Scientists also learned that a crust formed on the moon more than 4 billion years
ago. Meteorite strikes followed. Later, there were outpourings of lava. All of this
activity is recorded in the rocks.