According to the author, one positive side-effect of the high
costs involved in reusing space shuttles in subsequent
launches is the fact that
(A) NASA has given up launching rockets.
(B) NASA has largely given up on reusable spaceflight.
(C)NASA has made an alliance with Russian and
European companies.
(D) Russia and European countries are now investing on
refurbishing shuttles.
(E) new space companies have been developing
technology to reuse space shuttles with low costs.
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