单选题：Accordingtothistext.pilotedspacemissionswillneedtobe

题目内容：
Accordingtothistext.pilotedspacemissionswillneedtobe A．moreexcitingthanearlierfilmversions.
B．supportedbyinternationalorganizations.
C．morecost-effectivethantheyappeartobeatpresent.
D．financedbyindividualgovernments.

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