When thinking about whether a tool is practical, you should a. look at all of the components of the tool, determine whether it gathers the information you need, and rate how easy it'll be to use b. ask other people who have used the tool what it's like, use the tool yourself, and determine whether you like using it or not c. read the instructions to make sure you understand them, take a course to learn how to use the tool, and use the tool once to see if it works for you. d. read the instructions, rate how easy the tool will be to use, and figure out if the information you'll gather is useful.