Answer:
She can contribute to her employer's matching benefit.
Step-by-step explanation:
The best way for Matilda to save is to have the amount she intends to save deducted from her basic salary. By doing this, she will not have direct access to the money, so she cannot spend it. If her employer has a savings matching scheme, then Matilda should join it. Her savings account will grow faster due to her employer's contributions.
A low-interest account will discourage her from saving. The 529 schemes are designed to save money to cater to post-secondary education.