In “… we are making huge improvements in developing more environmentally-friendly operations at airports.” (lines 9-12), we can conclude that the a...

In “… we are making huge improvements in developing more environmentally-friendly operations at airports.” (lines 9-12), we can conclude that the aviation industry, except
a) is developing policies that help the impact of aviation on the health of the Earth.
b) is committed to establishing procedures that will make it greener for today and for the future.
c) is making ongoing environmental improvements so as to evaluate the negative impact of greenhouse gases only.
d) is involved in a range of initiatives and programmes aimed at reducing the impact of its operations on the environment.