The sum of two complex numbers, where the real numbers do not equal zero, results in a sum of 22i. Which statement must be true about the complex numbers?

Write the numbers as a + bi and c + di. Since their sum is 22i, its real part is 0, so a + c = 0; therefore, the real parts are opposites. The imaginary parts only need to add to 22, so they do not have to be equal or opposite.

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