I think that the best answer is "c. an incentive to bring their ideas to market" - you can see that through the statement of "<span>the opportunity to profit from their ideas"- an opportunity to profit is an incentive to work and in the case of the creators - to bring their ideas to market.
However, an opportunity to profit is not a guarantee that one will profit - so for example option a) is wrong. </span>
The concept of guided participation highlights that 
development occurs in a social situation while extending sociocultural beyond language-based dialogue.
The answer is D- when one company dominates an industry.
