Am having trouble with this question - could someone let me know if I'm thinking about the stimulus (and ACs) correctly?
Stim:
P1: When old trees die, the decomposition releases their stored CO2
P2: Harvesting old trees makes more room for young trees (who can absorb more CO2 than old trees)
C: Harvesting old trees for manufacturing things would reduce CO2 (and therefore we'd avoid the whole decomposing issue?)
My thoughts: Okay, that seems like it makes relative sense. There's an assumption there that the CO2 release by decomposed old trees would be offset by the young trees that can absorb more CO2.
ACs:
A - Animal species? Irrelevant.
B - At first I immediately eliminated this AC because it just didn't seem to make any sense. After more reading, it seems like okay, if the harvested old trees were manufactured into products that would decompose super quickly, we could still run into the CO2 decomposition issue.
C - This was the AC I originally picked, thinking that since a young tree contains 10 CO2 vs an old tree that contains 40 CO2, then clearly the young tree can't offset the decomposition of an old tree. But I think this AC is actually irrelevant because of course a young tree at a snapshot would contain less CO2 than an old tree would - but this seems to attack P2?
D - Irrelevant, dont need to know where most of the CO2 in a forest comes from.
E - I feel like this AC is trying to get us to attack P2 in a similar way C is, but we'd have to also assume that size of trees has some sort of correlation with CO2 absorption.
#help
Another reason I got rid of E was because it mentioned ANY Saharan ant. Maybe Saharan ants belong to the group of ants that don't use pheromones, so we don't really know anything about this group. Using that line of thinking, E requires you to make two assumptions: 1) the Saharan ant uses pheromones and if so, then 2) they are more efficient with the pheromones than without (maybe without pheromones they are more efficient because they can pick up on something else). Also, what does "temperatures are lower" mean? How much lower? What if we got to -20 degrees F? Then probably that also doesn't hold true.
Meanwhile, C to me constrained the type of ants to those who clearly forage during the afternoon, so the main small assumption I had to make was that the pheromones evaporating "without a trace almost immediately" meant that the ants couldn't pick up a scent. That felt reasonable compared to E (and especially to any of the other ACs).