问题详情

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