ACCorDing to《uCp500》, thE tErms "BEginning" oF A month in thE lEttEr oF CrEDit shAll BE ConstruED As( )．
A．From thE 1^st to thE lAst DAy oF thE month
B．From thE 1^st to thE 15^th oF thE month
C．From thE 1^st to thE 10^th oF thE month
D．From thE 1^st to thE 5^th oF thE month