The correct answer is C. Processing symbols.
Processing symbols are used to represent the arithmetic and logical operations that are performed on data. They include symbols such as +, -, *, /, and =.
Decision symbols are used to represent the logical decisions that are made in a program. They include symbols such as <, >, <=, >=, and =.
Input/Output (I/O) symbols are used to represent the input and output of data from a program. They include symbols such as INPUT, OUTPUT, and READ.
Terminal symbols are used to represent the end of a program. They include symbols such as END and STOP.
Here is a diagram that shows the different types of symbols used in flowcharts:
I hope this helps!