Why D but not E? Explain plz..

[bakhshaliyev]

Hi everybody!

Could you plz help me in the following quest:

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

[beat_gmat_09]

Hi everybody!

Could you plz help me in the following quest:

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

This question test's meaning and usage.
first mistake is using - lights that are visible, lights are always visible !
Here is a 3-2 split. in the non-underlined part of the sentence unobtrusive equipments is mentioned, meaning the earlier part must also have a classified type of equipment. This eliminates A,B,C.
E is incorrect because it uses when, which must be used in referring to time or in conditional stmts. This sentence does not use any.
D is better.

[bakhshaliyev]

Thanks

here is another question: A or D and why?


The 32 species that make up the dolphin family are closely related to whales and in fact include the animal known as the killer whale, which can grow to be 30 feet long and is famous for its aggressive hunting pods.
A. include the animal known as the killer whale, which can grow to be 30 feet long and is
B. include the animal known as the killer whale, growing as big as 30 feet long and
C. include the animal known as the killer whale, growing up to 30 feet long and being
D. include the animal known as the killer whale, which can grow as big as 30 feet long and is
E. include the animal known as the killer whale, which can grow to be 30 feet long and it is