One of the biggest drawbacks of student response systems is that often in ELA I want my students to do more than just answer multiple choice. How to get students to write answers while still taking advantage of the data these response systems have to offer? Simple: don't put answer options down!
I create the questions like above where A is a, B is b, C is c, and D is d. In groups, have students answer the question (or in the case of the above, finish the sentence) on a sentence strip. While the view is NOT on bar graph, have students put their sentence strip next to a letter. Students can then vote on the best answer. When done, flip it over to the bar graph view. Have students talk in groups about the results and then share out.