It’s not clear how learning some facts about individual T-mite egg-laying rates can help show the practicality of using T-mites.

This, if anything, is something that goes against the practicality of T-mites. The typical insecticides used on strawberry plants will end up killing the T-mites.

This doesn’t strengthen, because T-mites have seasonal synchrony with C-mites. So the length of the winter doesn’t make T-mites more or less practical to use. T-mites will simply be synchronous with C-mites regardless of the length of winter.

Learning that another mite kills T-mites doesn’t help establish the practicality of T-mites. It would be more helpful to learn that T-mites don’t have predators that could decrease their population in the areas we want them to control C-mites.

This strengthens the practicality of T-mites by showing that they can actually be generally used on strawberry plants. Imagine if (E) were not true — in that case, T-mites wouldn’t be as practical as a solution for C-mites, because they couldn’t survive in all the places strawberry plants are used. By helping to establish that they can survive where strawberry plants are used, (E) provides a reason for the practicality of T-mites as a way to control C-mites.