Which of the following is$/$are false with Megastore?

$($A$)$It uses a schematized, semi$-$relational data model, which is declared in a schema and strongly typed;$$

$($B$)$It keeps both local and global indexes;$$

$($C$)$It supports fast reads, but not fast writes;$$

$($D$)$After a write, all mutations that have been committed to the log must be immediately copied and applied to at least one replica.