In Year 1, Sandy and Chris Jones provided more than half of the support for each of their four unmarried adult children, Megna, Britt, Kay, and Lisa. All four children are U.S. citizens and all but Lisa live near the college they are attending. Megna is a 25-year-old full-time graduate student with no income. Britt, a 22-year-old part-time student, earned $15,000 from a part-time job as a security guard. Kay, a 19-year-old part-time student, earned $2,000 from a part-time job at the movie theater. Lisa, an 18-year-old rebellious child, lived alone, earned $7,700 as a waitress, and did not attend school during Year 1. What is the total number of exemptions Sandy and Chris can claim on their Year 1 joint income tax return?

A) 3

B) 4

C) 5

D) 6