fork.science

Question: Why is a 36-bit page number split into four parts in four-level paging?

A There are is a page table tree with 4 levels and each part carries a 9-bit index for each level B There are 4 pages and the 9-bit page numbers together comprise a 36-bit page number
C There are 4 bytes and each part specifies a different one these bytes D There are 4 page tables and each part carries a 9-bit index into each table