A group of college graduates decides to start a business. Though they are knowledgeable in various business domains, they are unable to arrive at a valuable business idea. They decide to search for ideas in a structured manner. They meet and start discussing everyone's ideas. Each idea is recorded and then thoughts that come up in relation to the ideas are written down and discussed. This process helps them to finalize a business plan. What techniques is used here?
a) reverse assumption analysis
b) attribute lisitng
c) mind mapping
d) forced relationship analysis