Which of the following statements about the relationship between MODS and DC are correct? (下面关于MODS与DC关系的说法哪些是正确的？)

A、MODS and DC are both used for describing digital resources （MODS和DC都是用于描述数字资源）;
B、MODS and DC both have a flat structure (MODS和DC都具有扁平结构).;
C、MODS is more complicated than DC
(MODS要比DC复杂).;
D、MODS inherits some elements from DC （MODS继承了DC中的部分元素）