Answer:
The correct answer is option a) keeping up in a market where sales come mostly from new products.
Explanation:
Since computer gaming is an ever evolving field where the gamer are always on the look out for new games to indulge in. Computer gaming companies keep a close eye on the changing trends so they can instantly replicate them and enter the trending high sales market.
This is a market that earns through keeping up with a market where sales and earning profit is dependent on new products.