Which of the following is a step that an incident handler should follow to handle malware safely?

Question $8$ options:

Source code reviews are used to detect bugs and irregularities in the developed web applications.

Develop and implement an acceptable email usage policy to define satisfactory behavior of an employee for using organization email.

Gather tools and resources required to handle cloud$-$based incidents

Ensure that the virtual machine or sandbox environment is isolated from the functional systems in the network.