D3 ni icyuya cyumye kandi cyumye icyiciro kimwe cyinganda, aricyo
irashobora guhangana namazi kandiumukungugu icyarimwe. Indege
kuyungurura isuku ningirakamaro cyane mugushakisha umukungugu ,.urwego rwamazi
igishushanyo mbonera kizarinda moteri amazi yuzuye. D3
ni byizaguhitamo gusya neza no gusya.