Which of the following can be triggered as part of a flow?

The ability to update records in Salesforce as part of a flow is a fundamental feature of Salesforce's automation capabilities. Flows are designed to automate business processes by allowing users to define a series of steps that can include creating, updating, or deleting records in Salesforce. This is essential for streamlining workflows, ensuring data consistency, and reducing manual tasks that could lead to errors.

Updating records can involve various objects within Salesforce, and flows provide a user-friendly interface to specify the conditions under which records should be updated. This capability makes it easier to implement complex business logic without writing code, enabling administrators and users to adapt and modify processes as business needs change.

Sending SMS messages, executing JavaScript, or exporting data files are not native actions within the flow builder. While integrations and other tools outside of flows might achieve these outcomes, flows themselves focus primarily on data manipulation, decisions, and user interactions within the Salesforce environment. Hence, option C stands out as the correct answer regarding the actions that can be triggered by a flow.