A DBMS

a$)$ is the software and hardware needed to run a database instance.

b$)$ facilitates authorization and authentication of access to data.

c$)$ permits query, store and modify of database structures and data.

d$)$ enforces locking to regulate concurrency of access to data.

only a$,$b$,$d are true.

all are true.

none are true.

only a$,$b$,$c are true.

only b$,$c$,$d are true.

only a$,$c$,$d are true.