Answers:
Social and cultural influences
Step-by-step explanation:
The biggest challenge to saving money is Social and cultural influences because social and cultural influences public to participate or disallow decisions made by corporations that affect the budget.
Social and cultural influences can not me measured accurately and it may change according to the change in social and cultural behavior, so money required for social and cultural influences can not be predicted accurately and biggest challenge to saving money.
Hence, the correct option is "Social and cultural influences"