"Primate gap" means

A、Thespacebetweenthemaxillarylateralincisorandthedistalincisorbetween4to6years
B、themaxillarydeciduousfangsappearedbetweentheageof4to6years
C、thegapbetweenmaxillarypapiaanddistalmaxillarypapiabetweenage4to6years
D、thegapbetweenthemaxillaryfirstprimarymolarandthemandibularfirstprimarymolarbetween4to6years
E、spacebetweentheupperandmandibularfirstandsecondprimarymolarsbetween4to6years“靈長類間隙”是指A--4～6歲期間，上頜乳側切牙近中和下頜乳側切牙遠中出現的間隙B--4～6歲期間，上頜乳尖牙近中和下頜乳尖牙遠中出現的間隙C--4～6歲期間，下頜乳尖牙近中和上頜乳尖牙遠中出現的間隙D--4～6歲期間，上頜第一乳磨牙近中和下頜第一乳磨牙遠中出現的間隙E--4～6歲期間，上--下頜第一乳磨牙和第二乳磨牙之間出現的間隙