The SRTM Performed Which of the Following

Multiple Choice

The SRTM performed which of the following?

A) Used radar waves from space to map the terrain surfaces of the Earth
B) Used radio waves from space to create a full three-dimensional model of the Earth
C) Used both radar and sonar to create a map of the Earth's surface (and the objects on the surface)
D) Used radar to map the heights of the oceans to create a new permanent vertical datum