mother and the son only? 2?

John and Jane White, husband and wife, provided more than 50% of the total support of the following individuals during 2020 : - Mrs. White's mother, who lives with the Whites full time and has no gross income of her own. - Their son, age 18, who lives with the Whites the whole year and has gross income of $7,900. - Their daughter, age 26, who lives with the Whites the whole year and has gross income of $6,600. - Their neighbor's daughter, age 16, who has lived with them since March 2020 (while her parents are in Mexico) and has no gross income. Mr. and Mrs. White file a joint return for 2020 . How many dependents do they have for ederal tax purposes? elect one: a. One b. Two C. Three d. Four