We can’t make assumptions about what (A) is saying. (A) says the difficulty level changes—okay, but in what way? We don’t know, and we can’t assume. We’ve been told that the location of trout changes with timing/water temperature, but that doesn’t make one option easier than the other.

Comparing density and heaviness of water doesn’t matter. We are discussing where to find the lake trout, and using the information we were given to try and do that.

The conclusion is specific to anglers that are looking for lake trout in deep temperate lakes. It doesn’t matter if they can be found elsewhere.

It doesn’t matter if they do. We were told that, as a rule, lake trout will be found in the coldest water.

And, even if they do alter their feeding habits, we don’t have any information on that variation.

This must be true. If (E) is not true, and turnover has occurred, then the lake trout will not be found at the surface level; the argument would be ruined.