$1\mathrm{.}5$ Which of the following would likely be included in an IT policy document advising on password security?

$\backslash$table$[[,$Policy$],[1,\backslash$table$[[$Use the same passwords for work and personal accounts, to make it$],[$easier for you to remember them.$]]],[2,\backslash$table$[[$Use strong passwords that combine mixed case, alphabot, numbers,$],[$and special characters.$]]],[3,\backslash$table$[[$Keep a list of all your passwords either in your desk drawer or another$],[$convenient location in case you forget them$]]],[4,$The system will ensure that the last $10$ passwords are not repeated.$],[5,$Passwords should be changed at least every $30$ days$]]$

Choose the correct answer:

A$.1,3$ and $4$

B$.2,3$ and $4$

C$.2,4$ and $5$

D$.4$ and $5$