Final answer:
The sum, difference, or product of two complex numbers can be a complex number.
Step-by-step explanation:
The sum, difference, or product of two complex numbers can be a complex number. Complex numbers are numbers that have both a real part and an imaginary part. The real part represents the horizontal axis (x-axis) and the imaginary part represents the vertical axis (y-axis) on the complex plane.
For example, if you have two complex numbers, (a+bi) and (c+di), their sum would be (a+c) + (b+d)i, which is again a complex number.
Therefore, the answer is option c) Complex.