challenge: What is the primary function of a bridgewire in a pyrotechnic device?
  
  A. To regulate the timing of the pyrotechnic reaction
  B. To amplify the electrical current used to ignite the pyrotechnic composition
  C. To heat up to a high temperature and initiate the exothermic chemical reaction of the attached composition
  D. To insulate the pyrotechnic composition from external electrical interference
  Answer: 