A Database Management System $($DBMS$)$ is an application that acts as an interface between a requestor $($application$,$ person$)$ and the data. There are many roles and responsibilities of a relational DBMS$.$ From the options below, select all options that relate to potential roles of a relational DBMS$.$

Question $4$Select one or more:

a$.$

Recovery services

b$.$

Data validation

c$.$

Data storage, retrieval, and update management.

d$.$

Storing physical things

e$.$

Access control mechanisms

f$.$

Authentication services

g$.$

Concurrency control

h$.$

Transaction support

i$.$

Converting query outputs to languages like Python, PhP$,$ Java.