单选题
Carbon ______ refers to the total set of greenhouse gases emissions caused by an organization.
A. fingerprint B. footstep C. footprint D. blueprint
A
B
C
D
【正确答案】
C
【答案解析】
fingerprint：指纹，手印；footstep：脚步；footprint：足迹，脚印；blueprint：蓝图
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