Culture is compared to the “software of our mind” and the grammar of our behavior because ( ).
选项：

A:The collective agreement in people's mind gives people guidelines about what things mean, what is important, and what should or should not be done.
B:All of the other three choices are correct.
C:Culture is a shared set of mental and psychological principles that exist in people’s mind.
D:The collective agreement in people's mind governs people’s behavior.