Why was the hydraulic fuel pump seal important for the space shuttle? The great significance of Voss’s findings lies in______.

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问题 Why was the hydraulic fuel pump seal important for the space shuttle?
The great significance of Voss’s findings lies in______.
Ⅰ. strengthening his determination to join in space flights
Ⅱ. furthering his understanding of NASA
Ⅲ. consolidating his astronaut status in NASA programs

选项 A、Ⅰ only.
B、Ⅱ only.
C、Ⅰ, Ⅱ and Ⅲ all included.
D、Ⅰ and Ⅱ only.