Final answer:
Risks to an IT infrastructure can come from various sources, not just computer-based attacks.
Step-by-step explanation:
The statement that is not true is option C: Risks to an IT infrastructure are all computer based.
In reality, risks to an IT infrastructure can come from various sources, not just computer-based attacks. Other types of risks can include physical threats like theft or natural disasters, as well as human errors and process failures. It is important to consider all these risks when developing IT security measures