Q266391 - EN - 2010 - ESCOLA NAVAL - Aspirante - Português e Inglês - Amarela

Which alternative completes the sentence correctly?

Unlike the atmosphere, which (1) by turbulent weather systems, the deep waters are fairly stable. This is because it (2) from above, in contrast to the atmosphere, which (3)from below.
(Adapted from http: //www.global–greenhouse–warming.com/ oceans.html)

a) is characterized – is heated – is heated
b) was characterized – heated – is heated
c) was characterized – is heated – heated
d) is characterized – heated – is heated
e) is characterized – is heated – heated