If you chose C, you don't want to make the assumption that because they are catering to ratings by 25 or younger that older people do not also watch those shows equally or more so.

D better answers the paradox of why they cater to younger vs. older age groups.

They got me in the first half, but i found my mistake in blind review.

I picked C initially, but on blind review I realized that it was a All before Most formal logic flaw.

I chose B because I forgot that No is group 4 (Negate, nessesary) and throught it fit into:

fish & /birds → gerbils when B actually means fish & birds → /gerbils

I did this without writing out any logic by remembering many implies some, and carefully parsing out the grammar and meaning of the stimulus.

I find it much easier to get the right answer than understand why wrong answers are wrong.

This frustrates me as I feel that I'm actually not getting better at deconstructing LSAT questions, and if the problem was harder, would most likely get it wrong.

Having just done the previous question, I got baited into choosing B

I got baited by D by not anchoring myself to the stimulus and choosing something that I thought to be true but is not supported by the passage.