GMAT Sentence Correction (SC) | Re: Displays of the aurora borealis, or "northern lights"

Hi,
Here is a GMATPrep SC question. I am following PR for sentence correction rules. Is there any one who is following same? What does following fall under according to Princeton review. is it idiomatic expression? "enough x to affect y and induce z". what does logical predication refer to in PR?


Displays of the aurora borealis, or "northern lights", can heat the atmosphere over the arctic enoughto affect the trajectories of ballistic missiles, induce electric currents