The OASDI program pays survivor benefits to eligible family members based on the deceased worker's earnings record. Explain whether each of the following persons would be eligible for OASDI survivor benefits based on the deceased worker's earnings record. Treat each situation separately.
a. A surviving spouse, age 35, who is caring for an unmarried child under age 16.
b. A son, age 19, who is attending college full-time.
c. A surviving spouse, age 55, who has no children under age 16 in her care.
d. A surviving spouse, age 60, who has been out of the labor force for several years.