[单选题]
The elements in the per0xdewa+nl i(*g4 wa+c iodic table which lack .0oyy:deh7 g ll*f-l+az.oqheo)uu c t) ;*h hone electron from a filled shell are referred toh7uo;c):u0y-efdo l l*q*+haz. heotg ly h.) as
A. noble gases.
B. halogens.
C. alkali metals.
D. transition elements.