3. Let $a, b, c \in \mathbf{C}$, (1) If $a^{2}+b^{2}>c^{2}$, then $a^{2}+b^{2}-c^{2}>0$ (2) If $a^{2}+b^{2}-c^{2}>0$, then $a^{2}+$ $b^{2}>c^{2}$, which of the following is correct?
A. Both (1) and (2) are correct
B. (1) is correct, (2) is incorrect
C. (1) is incorrect, (2) is correct
D. Both (1) and (2) are incorrect
3. B Imaginary numbers cannot be compared in terms of size