Why is the superposition theorem useful in the analysis of m
     Why is the superposition theorem useful in the analysis of multiple-source circuits?  because only Ohm\'s law is required  because all sources are open-end  the circuit can be analyzed one-source at a time  because all sources are shorted out 
  
  Solution
The circuit can be analysed by one source at a time. And the responses of all sources are added together to get the final response.
Option C is correct

