QUESTION $2$

Given a security classification $L1>L2>L3>14,$ where $L1,L2,L3,$ and $L4$ are security levels, and $">"$ means dominates.

If a subject X$\text{'}$s security level is L$4,$ and an object Y$\text{'}$s security level is L$2.$ According to the Mandatory Access Control $($MAC$)$ policy, which of the following statements is correct?

A$.x$ can write to $Y,$

B$.x$ cannot read $Y$ nor write to $Y.$

C$.x$ can both read and write to $Y$

D$.x$ can read $Y.$