Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: The Dawn spacecraft has already provided a stunning look at the surface of Ceres - and its latest shot is the most detailed yet. It reveals pockmarked craters on the surface that have been formed from the re-impact of debris from larger impact sites. But the image doesn’t reveal any more clues about the ‘bright spots’, or so-called 'alien' flashes, that are continuing to dumbfound scientists and the public alike. This image was taken by the Dawn spacecraft on 23 May from a distance of 3,200 miles (5,100km). The resolution is around 1,600ft (480 metres) per pixel - the best ever of the dwarf planet so far.Nasa scientists in California revealed the best image of Ceres yetIt was taken by Dawn from a distance of 3,200 miles (5,100km)The image reveals small craters caused by the 're-impact' of debrisBut the bright spots on the surface of the dwarf planet remain a mystery 
 Question:Over the next few months, _ will lower its altitude to enable it to see as much of the surface as possible, and reveal more interesting features like this.

Dawn