unDEr its ChArtEr, thE u.n. guArAntEEs (保证)______.
A．nEvEr to usE Arms
B．to Employ intErnAtionAl mAChinEs
C．BEttEr stAnDArDs oF liFE
D．to promotE EConomiC AnD soCiAl ADvAnCEmEnt