For $2024,$ 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$$ single son, age $18,$ was a full$-$time student for $4$ months. He lived with them all year and earned $$5,650,$ which was spent on his support.

The Randalls$$ single daughter, age $25$ and a full$-$time student for $12$ months, lived with them all year. She earned $$3,450,$ which was spent on her support.

The Randalls$$ granddaughter, age $3,$ lived with them from June through December.

Mrs$.$ Randall$$s mother, age $68,$ a Canadian citizen living in Canada, received Social Security benefits of $$5,750.$

Mrs$.$ Randall$$s cousin, age $16,$ lived with them all year and earned $$2,250,$ which was spent on her support.

How many dependents may Mr$.$ and Mrs$.$ Randall claim on their $2024$ tax return?

A$\mathrm{.}2$

B$\mathrm{.}5$

C$\mathrm{.}3$

D$\mathrm{.}4$