单项选择题

A.摆放在同一货架不同层面上,由上向下的次序为:200707,200615,190521,190508
B.摆放在同一货架相临摆放,由左向右的顺序为:190508,190521,200615,200707
C.摆放在货架同一位置,由里向外的顺序为:190508,190521,200615,200707
D.摆放在货架同一位置,由里向外的顺序为:200707,200615,190521,190508