The three variables which determines how much interest a person could earn from a savings account are:
- B. Amount, interest rate, time invested
According to the given question, we are asked to show the three variables which would determine how much interest a person would get from a savings account.
As a result of this, we can see that the three variables which helps to determine how much interest a person would earn from a savings account is  the amount invested, the interest rate and the time invested before maturity date.
Therefore, the correct answer is option B
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