Question: how to repel flies from your porch

  Options: 
 A. Fill a spray bottle with half water and half ammonia, and splash in 15 drops of essential oils like mint, lemon, lavender, citronella, or eucalyptus. Spray the house or the porch liberally so you can kick your feet up bug-free.
 B. Fill a spray bottle with half water and half vinegar, and splash in 15 drops of essential oils like mint, lemon, lavender, citronella, or eucalyptus. Spray the house or the porch liberally so you can kick your feet up bug-free.
Answer: B