snoep wrote:
Voyager 1, a space probe launched to explore the outer solar system, monitored the magnetic fields and rings of Jupiter and Saturn and provided the first detailed images that scientists could use to study Titan as a potential human-occupied outpost to evaluate its substantial atmosphere.
A. that scientists could use to study Titan as a potential human-occupied outpost to evaluate its substantial atmosphere
That scientists could study -> That correctly refers to images. its - pronoun refers to Titan. studying Titan as human-occupied outpost - structure seems ok
As is playing a function/role equivalent function here
B. that scientists could use to study Titan’s substantial atmosphere to evaluate it as a potential human-occupied outpost
that - correctly refers to images. 'it' does not have a reference as Titan is in possessive form.
C. that scientists study as a potential human-occupied outpost to evaluate Titan’s substantial atmosphere
first detailed images that -> correctly to images. Next part of the sentence suggests scientists usually study these images .
also note here as is playing is connecting scientists as potential human-occupied outpost
D. for scientists to use to study Titan’s substantial atmosphere to evaluate it as a potential human-occupied outpost
this option suggests - images were primarily provided for scientists. one of use of those images is that scientists can study them but that's not the sole reason to fetch the images.
Also 'it' does not have a reference
E. for scientists to study Titan as a potential human-occupied outpost to evaluate its substantial atmosphere
same error as D - related to 'For'
A seems to be correct answer!
You are very close,
snoep!
While you are on the right track to focus on pronouns, you also need to check for meaning! Here are the meaning differences between options A & B:
A. that scientists could use
to study Titan as a potential human-occupied outpost to evaluate its substantial atmosphere
This almost suggests that Titan has already been accepted as a potential human-occupied outpost, and then evaluate the atmosphere. That doesn't really make logical sense - we need to make sure the atmosphere is safe BEFORE we decide if it's a place where humans can go.
B. that scientists could use
to study Titan’s substantial atmosphere to evaluate it as a potential human-occupied outpost
This makes more sense logically. The images are meant to study the atmosphere, and THEN we can evaluate if it can be inhabited by humans.
Let's also address your issue with option B:
B. that scientists could use to study Titan’s substantial atmosphere to evaluate it as a potential human-occupied outpost
that - correctly refers to images. 'it' does not have a reference as Titan is in possessive form.
There is nothing wrong with "it" referring back to a possessive "Titan's" in this case. The reader can easily determine what the pronoun is referring back to, so it's okay to use it in this manner.
I hope that helps! Feel free to tag us at
EMPOWERgmatVerbal if you have other questions!
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