An independent computer service company tallied the service requests it receives for individual brands of personal co...

maeve on September 4, 2023

Why not D?

I see how A weakens the argument, but why isn't D correct? Thank you!

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Emil-Kunkin on September 4, 2023

Hi, d would be incorrect because the author noted that they already factored in each brands market share. This variable has already been controlled for, so it isn't relevant how much each brand has.