Same issue!

In such dense NA questions, narrowing down on the conclusion and using it as a guiding post is the best strategy. Here the conclusion is: "differences in resolution are irrelevant (for practical photography)' + a convoluted reason for why this is the case. For this question, I found that it is in fact possible to identify the correct answer based on this summarised conclusion (i.e differences in resolution are irrelevant), without a full understanding of the reason given for this conclusion in the stimulus.