Answer:
C. adopting a questioning attitude.
Step-by-step explanation:
Since in the question it is mentioned that they have to develop the products for the marketing group so for this they started to exploring the approaches that worked on the past and identified those approaches that does not worked before so here she wants that the process should be begins by adopting the questioning attitude that means they are capable to identify the errors facing in a activities they perfomed
Therefore the option c is correct