Conclusion: These new light bulbs will sell poorly.

Stem: Which AC does not support this?

E proposes an even newer bulb (i.e. it's a bulb that is completely different from those 3x the price of conventionals). E's light bulb causes the analyst's "new light bulbs" to sell even more poorly. Answer choice E supports the conclusion.

I first thought D lent support since no one buys 4-packs of something they wouldn't buy 1 of. I realize now that being able to buy 1,4, or a million of these bulbs changes nothing about the argument. The prediction is unaffected.

Brilliant summary. I was so thrown off by the increase of total sales and decrease of individual sales, but you're right: all I need to know is that the accountant bases her decrease in desirability on her sales figures. This support is torn down by E).

Have the "Old Problem Sets" now been removed from the syllabus? Did I miss an update on this happening?

There are strict, necessary conditions in this question. All we know is that :

Plowing the buried seeds exposes them to sunlight.

For germination, must have prolonged darkness followed by exposure to sunlight.

/D is a tough one. Redeposited seeds, though, are not a necessary condition. If seeds have PDFS, they should still germinate.

/B Will plants grow if not plowed or if not exposed to sunlight? We just don't know.

/C Again, will there be growth without sunlight? We don't know.

/E Surface seeds do not meet necessary PDFS, and will not germinate.

(A) Seeds that meet necessary germination conditions grow more than one that don't meet those conditions, specifically sunlight exposure. Yes.