例2 Unfortunately, Hubble telescope was initially delayed in relaying its first pictures back from space due to a simple mathematical miscalculation.
Why does the author begin paragraph 2 with Unfortunately?
A. it indicates that NASA has been unhappy with all of Hubble’s photograph.
B. It shows that NASA’s plan to use stars to orient the Hubble telescope was misguided
C. It emphasizes the need to have telescopes on Earth.
D. It indicates that high expectation were not initially met.
Unfortunately,表明了作者对Hubble 望远镜的态度。所在正确答案是D。