You create an automated flow. In the new step, you need to combine the two text outputs from the previous actions and send them in a mobile notification body text. 
What should you use to accomplish this task?

Answer options:

A.Trigger
B.Dynamic content
C.Expressions
D.Connector

Correct Answer: C 
When you need to perform operations on strings, numbers, or dates, you need to use the Expressions. Power Automate expression builder helps users create expressions that contain functions, operators, variables, explicit values, or constants. All expressions are organized in groups, like String functions, Collection, Logic functions, Manipulation, etc. The Expression builder is a second tab after Dynamic content. The operation to combine the two text outputs is called string concatenation and is part of the String functions. 

Option A is incorrect because a Trigger is an operation that initiates the actions when a specific event occurs. It does not manipulate the text outputs.
Option B is incorrect because Dynamic content provides the inputs and outputs to use in the flow steps. It does not manipulate the text outputs.
Option D is incorrect because a Connector is a proxy wrapper around APIs of the various applications and cloud services that facilitates data access. It does not manipulate the text outputs.
For more information about the Power Automate Expressions, please visit the below URLs: 

https://docs.microsoft.com/en-us/learn/modules/introduction-expressions/2-get-started
https://docs.microsoft.com/en-us/azure/logic-apps/workflow-definition-language-functions-reference