Which of the following is a key feature of a non$-$relational database like NoSQL?

a$.)$ It efificiently uses indexes as a means to provide efficient access to data and is supported directly in the database rather than maintained in the application code.

b$.)$ It has high scalability and performance that can enable almost unlimited growth.

c$.)$ It ensures strong consistency such that applications should be able to read what has been written to the database immediately.

d$)$ It uses expressive query languages to be able to access and modify the data.