Wilma,age 70 and Single,is Claimed as a Dependent on Her

Wilma,age 70 and single,is claimed as a dependent on her daughter's tax return.During 2011,she had interest income of $2,400 and $800 of earned income from baby sitting.Wilma's taxable income is:

A) $700.
B) $850.
C) $1,800.
D) $2,250.
E) None of the above.