How do you enforce these restrictions when requesting an instant loan?

To qualify for an instant loan, an applicant must earn a monthly income of at least GBP2000 and cannot exceed GBP20000 in credit card debt.

How do you enforce these restrictions when requesting an instant loan?
A . Use UI controls to validate the entries in the income and credit card debt fields.
B . Use a Validate rule to call two Edit validate rules: one for income and one for credit card debt.
C . Use a single Validate rule with two conditions; one for income and one for credit card debt.
D . Use two Edit Validate rules; one for income and one for credit card debt.

Answer: C