Which detail from "Space Junk!" best conveys the author's viewpoint that space junk poses a serious problem for navigating space safely? "The more we rely on advanced technology, the more likely it is that we will send additional satellites into space."

"The pieces vary in size from softball-sized to those the size of marbles, or even smaller. Additionally, there are millions of debris pieces too small to measure."

"Pieces from rocket launchers, bits of metal fallen off of satellites, nuts and bolts, and even chips of paint are all considered space junk."

"Sharing this space are active satellites, so there is growing concern about how to keep the satellites from being hit by the debris."