单选题 Such legal entities provide the means for international cooperation and support of macroprojects related to the moon and mars that encourage global private sector participation.
【正确答案】 A
【答案解析】[分析] 名词辨析 entities实体；A．existences存在，存在物；B．vitalities活力，生命力；C．persistences坚持，持续；D．complicities 同谋，共犯；因此A为答案。