Fact 1: Loud noises can cause animals to startle.

Fact 2: Anything out of the ordinary can startle and spook animals into uncommon and dangerous behaviors.

Given the two facts above, answer the question "What can cause animals to become dangerous?" with the following options: 
- threatened
 - Befriending them
 - influenza
 - hyperthyroidism
 - Helping them
 - Loud noises
 - Happy thoughts
 - steroids


 

      Loud noises   