A Car Manufacturer Decides to Promote the Sales of His

A car manufacturer decides to promote the sales of his product by offering discounts online via an email campaign.Consumers simply have to click on a link in the email,and they will be able to avail the offer.The advantage of using this technique is that it not only increases brand awareness for the company,but also: 

A)  measures the number of users who display interest in the site. 
B)  provides information on the bounce rate. 
C)  increases consumer loyalty toward the brand. 
D)  can help in maintaining a consumer database.