Which of the following sentences is CORRECT according to the phone bill below?
The table shows the monthly phone bills of four family members.
| Family Member | Plan Fee ($) | Extra Usage Fee ($) | Total Bill ($) |
|---------------|--------------|---------------------|----------------|
| Father | 50 | 20 | 70 |
| Mother | 40 | 10 | 50 |
| Son | 30 | 5 | 35 |
| Daughter | 25 | 15 | 40 |
A)The son paid the least extra usage fee.
B)The father's total bill is less than the mother's.
C)The daughter's plan fee is the highest.
D)The mother's extra usage is less than the son's.