Problem-solving is about
a. coming up with solutions by) knowing the right formula or equation
c. using critical thinking skills in the process
d. only mathematics

   Think about this question philosophically such that you understand why people solve problems in the first place. Problem solving is an aspect and journey in life, where self discovery is rewarding and occurrent. Therefore, what do you think-- what is the essence of problem solving? Remember that problem solving isn't specific, and applies to anything in the world. It's the process that counts. These are my words.