Which of the following identifies two technological advancements of space exploration history during the period between 1960 and 1969? (3 points) a
Satellites were launched by the United States, and solar energy was an invented.

b
The first human was sent into space, and water was discovered on Mars.

c
Numerous spacecraft launches resulted in technological advancements, and humans landed on the moon.

d
Robotic spacecrafts were sent to gather information about Halley's comet, and the twin Voyagers gathered data from distant planets.