The correct answer is letter "C": Hispanic Americans.
Explanation:
Hispanic Americans represent the second largest ethnic group in the United States with 52 million people according to the U.S. Census Bureau (2010), which is 16.7% of the total population. Hispanic Americans are the largest group using mobile devices for different purposes that go from banking to streaming services. It is estimated that around 47 million of them are U.S. citizens.
In such a scenario, <em>mobile carriers such as Sprint, AT&T or U.S. Cellular should focus on how to provide them with services that attract Hispanic Americans' attention so those companies can boost their sales.</em>