Question posts can either be short answer or they can be multiple choice. To switch between short answer, which is the default option, and multiple choice, use the first drop-down menu in the question options, as shown here:

Each question can only have a single multiple choice question. The  Chapter 7, Google Forms for Multiple Choice and Fill-in-the-blank Assignments shows how to create assignment posts with several multiple choice questions. After selecting the multiple choice option, radio buttons will appear below the question options. To add more multiple choice options, click on Add option in the list:

Multiple choice questions only have one option: Students can see class summary. The results will display on the post after the student has submitted their responses. An example of this option, which is enabled by default, is shown here:

In the preceding screenshot, the darker grey sections on the left visually represent the number of times the choice...