12. In Rt $\triangle A B C$, the right-angle side $A B=6$, $A C=8$, the following three conclusions:
(1) The distance from the circumcenter to $A B$ is 1;
(2) The distance from the orthocenter to $B C$ is 4.8;
(3) The distance from the incenter to the circumcenter is $1 \frac{2}{3}$ ( ).
(A) Only (1);
(B) (1) and (2);
(C) (2) and (3);
(D) All correct;
(E) None correct.
$\mathrm{D}$