Read these sentences from the passage. “Can you imagine building a house in one day? A collaboration between a nonprofit organization and construction company in Texas is leading a revolution in homebuilding. It uses a gigantic 3D printer to build small homes by squirting layers of concrete to build floors and walls.”

What can you conclude about 3D printers based on this information?

A. 3D printers are usually a little slower than traditional building methods.

B. 3D-printed houses are usually much larger than normal houses.

C. Construction companies in Texas only use 3D printers.

D. 3D printers can make large objects more quickly than traditional methods.

(This is from the ReadWorks passage "Printing the Future".)​