Concept:A computer virus spreads when infected files or executable code are transferred between devices, not through normal document formatting tasks.
Explanation:Viruses commonly spread through email attachments, infected external storage devices, and harmful files or programs downloaded from the internet.
Formatting a document means changing its appearance, such as font style, size, alignment, or page layout.
This process only modifies the visual presentation of text and does not transfer or execute any infected code.
Therefore, formatting documents cannot transmit a computer virus.
Answer:A. formatting of documents