Hi, I'm Rashid. I served in the Peace Corps as an Information and Communication Technology Volunteer in the southern African nation of Namibia. Namibia is a big country geographically, but in terms of population, it's very, very small. To put it in perspective, it has about one-fifth as many people as New Jersey, but it's 40 times larger. And, unlike New Jersey, it's very dry, and there are a lot of goats—a lot of goats.

One day, I was sitting in my house, in Namibia, reading a U. S. newspaper on my cell phone.

Oh, I should backtrack for a minute here. Yes, Africa has cell phones. In fact, every Peace Corps volunteer in Namibia has a cell phone, as well as every adult Namibian I knew, and most teenagers. Cell phone coverage reaches every major town in Namibia, and most of the minor ones, as well—even small villages.

And this isn't only Namibia. Cell phones are everywhere in Africa and even though one in four Africans has a cell phone, you rarely see anyone talking on them—you see, it's simply too expensive. Instead, everyone is text messaging. Text messaging, you see, is very cheap. For $10 U. S. dollars you can walk into a shop in Namibia, and walk out with a cell phone—not a very nice one, mind you, but a fully functional one—that has enough prepaid credit to send 100 text messages a day for three months.

–“A Story of a Peace Corps Volunteer in Namibia,”
Rashid Khan

Which key sentence from the passage identifies this text as a primary source?

A. “I served in the Peace Corps as an Information and Communication Technology Volunteer in the southern African nation of Namibia.”
B. “In fact, every Peace Corps volunteer in Namibia has a cell phone, as well as every adult Namibian I knew, and most teenagers.”
C. “Cell phone coverage reaches every major town in Namibia, and most of the minor ones, as well—even small villages.”
D. “For $10 U. S. dollars you can walk into a shop in Namibia, and walk out with a cell phone—not a very nice one, mind you, but a fully functional.”