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. Neither (1) nor (2) is correct
3. B Imaginary numbers cannot be compared in terms of size