KS15 wrote:
How is C parallel? We need to have 'that gauges and .......that shuts'. Only D looks to like a possible answer.
HeyKS15 ,
I am happy to help.
"That" in option C is implied here. We call it Ellipsis. Both the below versions are perfectly fine:
that gauges the fuel level of the external liquid hydrogen tank and[that] shuts
that gauges the fuel level of the external liquid
...
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