When adding complex numbers, we add similar terms. This means that we add the real number parts, and then we add the imaginary number parts.
So,
[tex]\begin{gathered} (3+11i)+(-3-11i) \\ =\left[3+\left(-3\right)\right]+\left[11i+\left(-11i\right)\right] \\ =0+0i \end{gathered}[/tex]
The answer is option B, 0 + 0i.
