The following diagram shows two budget lines: A and B. 
Which of the following could explain the change in the budget line from A to B?
Definitions:
Annuity Due
An annuity in which payments are made at the beginning of each period.
Equal Payments
Regular payments of the same amount over a specified period, often used in loan repayments or annuities.
Time Period
A specific duration marked by a start and an end point, often used to measure or track events, performance, or changes.
Ordinary Annuity
Regular payments of the same amount delivered at the close of successive intervals, across a specified timeframe.
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