Final answer:
To load a command package in R, the correct command is library(name). The package must first be installed with install.packages() before it can be loaded with library().
Step-by-step explanation:
To load a command package and make its commands ready for use in a programming environment like R, the correct command to use is library(name). This function takes the name of the package you wish to use and loads it into your current R session, making the functions and data sets provided by the package available for use. It's important to note that before you can use a package with the library() function, it must first be installed, typically using the install.packages() command.