Which command would you use, if running tools like vmstat and prstat is resulting in "file not found" errors?

Which command would you use, if running tools like vmstat and prstat is resulting in “file not
found” errors?

A.
pkg

B.
installadm

C.
boot net: dhcp – install

D.
format

E.
fdisk

Explanation:
To patch a Solaris system or install a command you use pkg command.