Lacking information about energy use, people tend
to overestimate the amount of energy used by
equipment. such as lights, that are visible and must
be turned on and off and underestimate that used
by unobtrusive equipment, such as water heaters.
A) equipment, such as lights, that are visible and
must be turned on and off and underestimate
that
B)equipment, such as lights, that are visible and
must be turned on and off and underestimate it
when
C )equipment, such as lights, that is visible and
must be turned on and off and underestimate it
when
D)visible equipment, such as lights, that must be
turned on and off and underestimate that
E) visible equipment, such as lights, that must be
turned on and off and underestimate it when


Can someone please help me in eliminating choice between D and E specially between that and it?
OA D

thanks.