In New South Wales the Capacity of Minors to Enter

In New South Wales the capacity of minors to enter into contracts is:

A) limited to contracts for food,clothing and other necessaries.
B) limited to contracts where the minor did not pay with cash or a credit card.
C) determined by whether they understood the contract and received a benefit within 12 months after they become 18 years of age.
D) determined by whether they understood the contract and received a benefit when the contract was made.