Which statement is true with Chubby?

$($A$)$ Chubby has an interface similar to a file system, supporting reads and writes of any portion of the file

$($B$)$ Chubby offers a library service for consensus, which uses Paxos algorithm

$($C$)$ When the Master$/$Primary does not get its majority of the vote, it may not renew its lease

$($D$)$ If a client is informed that file contents have changed, it is guaranteed to see the new data right away.