The issue of whether astrology is a science

Hi,

I got in trouble with this question although I got the answer choice correctly by eliminating the rest evidently wrong answer choices. But I am not sure how to approach this question. I guess this is a division/composition reasoning flaw. But I don’t know why having some features of the related subject doesn’t lead that object to the subject, which is science in this stimulus.

Any help will be apprecited.

I didn’t find the right solution from the Internet.

References:
https://forum.powerscore.com/lsat/viewtopic.php?t=7890
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Thank you.