Which of the following best describes blocking, a principle of experimental design? o a. an experiment that features many groups of subjects as well as different kinds of tests, if possible b. the separation of experimental subjects into groups that are as similar as possible to control the effects of lurking variables c. the selection of experimental subjects from a large group of units or subjects and then randomly assigning members to treatment and control groups using either a random number generator or a random number table d. a feature of an experiment designed to isolate the variable under observation

Have you ever been in the middle of telling a story and had to use hand gestures or even a drawing to make your point? in algebra, if we want to illustrate or visualize a key feature of a function, sometimes we have to write the function in a different form—such as a table, graph, or equation—to determine the specific key feature we’re looking for. think about interactions with others and situations you’ve come across in your own life. how have you had to adjust or change the way you represented something based on either the concept you were trying to describe or the person you were interacting with? explain how the complexity or layout of the concept required you to change your style or presentation, or how the person’s unique learning style affected the way you presented the information.