Final answer:
The runtime context of a trigger is known as the A. trigger context. It provides a set of system variables that can be accessed and used within the trigger's code. The runtime context of a trigger is called the trigger context.
Step-by-step explanation:
The correct answer is A. Trigger context. The runtime context of a trigger is known as the trigger context. It provides a set of system variables that can be accessed and used within the trigger's code. These variables provide important information about the trigger execution, such as the record that caused the trigger to fire, the old and new values of the record fields, and the user who caused the trigger to fire.
For example, in the context of Salesforce, when a trigger fires on a specific object, such as an Account or Contact, the trigger context provides access to variables like Trigger.new and Trigger.old which contain the new and old records respectively.
Understanding the trigger context is crucial for developing effective triggers as it allows developers to access and manipulate the relevant data based on the trigger event. By using the trigger context properly, developers can perform actions before or after any record is inserted, updated, or deleted in a system.