Question $1$

Mary is $66$ years old and receives full old$-$age benefits from Social Security $-$in her case, $$1,200$ per month. Her husband Ralph, age $68,$ who has not worked enough quarters outside the home to be covered in his own right, receives $50\%$ of what Mary receives each month $($$$600).$ Assume that Mary dies tomorrow.

What will Ralph's Social Security benefit be$?$

$$600$

b$.$ $$1,200$

c$.$ $$1,800$

d$.$ $$2,400$