Final answer:
Apex is an object-oriented programming language developed by Salesforce used to create software applications integrated with Salesforce’s ecosystem.
Step-by-step explanation:
Apex is an object-oriented programming language developed by Salesforce. An application is an environment that contains methods and classes, enabling users to create software.
Therefore the correct statement here is:
A) Object-oriented, app, interface, algorithms, variables, web applications
Apex allows developers to execute flow and transaction control statements on Salesforce servers in conjunction with calls to the API. It is tightly integrated with the database and can invoke auto-executed triggers on objects when specific events occur.