Which of the following instruction formats illustrates that a decision needs to be made?
a. diagram
b. list
c. if-then table
d. flowchart

The correct answer is D. Flowchart

Explanation:

A flowchart is a diagram used to depict a series of steps in a process, most flowcharts are composed by concepts or ideas in different boxes that are connected with arrows, this guides the reader through different ideas that are related to a general topic, purpose or process. Because of this, flowcharts are commonly used as part of models for solving problems in which the reader is taken to possible solutions by answering yes or no questions, in this way according to the answer from the teacher different solutions are offered. Thus, the instruction format that implies the reader taking decisions is a flowchart.