A爺爺、奶奶對(duì)小君有優(yōu)先監(jiān)護(hù)權(quán)

B任某因再婚對(duì)小君不再有監(jiān)護(hù)權(quán)

C任某對(duì)小君的監(jiān)護(hù)權(quán)不因再婚而改變

D任某對(duì)小君是否具有監(jiān)護(hù)權(quán)要看小君是否改姓而定