When we pray, "And lead us not into temptation, but deliver us from evil," we are primarily asking God to empower us to avoid and overcome temptation. This petition acknowledges our vulnerability to sin and the evil that can influence our choices. By asking God not to lead us into temptation, we are seeking His guidance and protection against situations that may lead us to fall into wrongdoing. Furthermore, by asking for deliverance from evil, we are expressing our reliance on God to rescue us from the forces that can lead us away from Him and harm our spiritual wellbeing.
Thus, the most fitting interpretation from your options is: empower us to avoid and overcome temptation.