Researcher Randy Lewis and his collaborators wanted to manufacture fibers of spider silk by inserting spider genes into goats. These "transgenic" goats produced milk that contained an extra protein. Lewis and his team extracted that protein from the milk. They then removed the fibers one at a time with a metal rod and spun them into silk. While the lightweight fiber was strong, it was not yet as strong as real spider silk. "Nothing is as strong as the natural [spider-produced] fiber yet," Lewis said at the time, adding, "but we are working on solving that problem." Do It! Lewis's team _________ spider-like silk. Press enter to interact with the item, and press tab button or down arrow until reaching the Submit button once the item is selected A generated B crystallized C rejected D classified