Answer:
b. the increase of consumers using digital media to publicize their own product reviews
Step-by-step explanation:
Social media has generated that people to use them to talk about the products they buy and to review other people opinions about products they want to buy. Because of that, this have became a trend in which consumer-generated information is really important and now it is really easy to find a review of a product you want to buy and people consider these opinions to be honest and reliable. According to this, one trend that has caused consumer-generated information to gain importance is: the increase of consumers using digital media to publicize their own product reviews.