| a. Windows versions of R have other optional help system also |
| b. The help.search command (alternatively ??) allows searching for help in various ways |
| c. R is case insensitive as are most UNIX based packages, so A and a are different symbols and would refer to different variables |
| d. $ R is used to start the R program |
| Answer: R is case insensitive as are most UNIX based packages, so A and a are different symbols and would refer to different variables |