For 2019, Mr. and Mrs. Randall filed a joint return. During the year, they provided more than 50% of the support for the following individuals: The Randalls' single son, age 18, was a full-time student for 4 months. He lived with them all year and earned $5,150, which was spent on his support. The Randalls' single daughter, age 25 and a full-time student for 12 months, lived with them all year. She earned $2,950, which was spent on her support. The Randalls' granddaughter, age 3, lived with them from June through December. . Mrs. Randall's mother, age 68, a Canadian citizen living in Canada, received Social Security benefits of $5,250. Mrs. Randall's cousin, age 16, lived with them all year and earned $1,750, which was spent on her support How many dependents may Mr. and Mrs. Randall claim on their 2019 tax return? A. 3 B. 5 C. 4 D. 2