History, 14.02.2022 19:00, robert7248

According to the article, why is air sometimes considered to be a factor of production?
A.
because sometimes it is free to use in
deep underground mines
B.
because sometimes it is available in
unlimited quantities
с.
because sometimes it has to be piped for
production to proceed
D.
because sometimes there is a substitute
for it

Answers: 1

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According to the article, why is air sometimes considered to be a factor of production?
A.