Obscure method

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Given the following recursive method:

public static long method(long a, long b) {
    if (a == 0) {
        return 1;
    } else if (a == 1) { 
        return b;
    }
    return b * method(a - 1, b);
}

What does the method calculate?

Select one option from the list

It calculates b raised to the a-th power.

It calculates b raised to the (a-1)-th power.

It calculates b multiplied by (a-1).

It calculates b multiplied by a.

It calculates a multiplied by b.

It calculates a raised to the b-th power.

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