Final answer:
SQL (Structured Query Language) is the international standard language for processing databases, widely used in various relational database management systems.
Step-by-step explanation:
The international standard language for processing a database is SQL (Structured Query Language). Options A) Cassandra, B) DB2, and D) MS Access are all database technologies or products, and they may use SQL as their language for managing and querying data, but they are not themselves languages. SQL is widely used for writing data queries, manipulating data, and defining data structures in relational databases.
SQL provides a standardized way for developers and database administrators to interact with relational databases. Many database systems, including Microsoft SQL Server, Oracle, MySQL, and PostgreSQL, implement SQL with their own proprietary extensions; however, they all support the core functions defined by the SQL standard. This makes SQL a crucial skill for anyone working in database design, administration, or analysis.