Option D is the correct answer because “extricate” means to free someone or something from a constraint or Duty, which is correct here because the carriage was freed after 2 hours.
Option A is incorrect because “to exert” means to to apply, usually pressure is exerted, which causes the extrication.
Option B is incorrect because “pillage “ means robbing using violence especially during war time, which is incorrect here.
Option C is incorrect because “exacerbate” means to make things worse, hence it is incorrect.