Answer:
Option D
Step-by-step explanation:
When providing an online service, a company firstly targets to reach the maximum audience. With the increase in reach of audience the chances and feasibility of sales also increases.
But, still there are many customers who desire to have a free trial of service, in order to ensure themselves about the quality and detailed description of service.
In case company agrees to provide free trial, those customers are also satisfied and tend to avail the online service.
Thus, although the sales is directly proportional to the number of visitors, but it would definitely increase by providing the free trial of online service, as ensures more satisfaction in customers.
Final Answer
Option D