The correct answer for this question is this one: Limiting the amount of personal information available to others includes reducing your carbon footprint, and personal information items not required for your operational mission such as credit cards and other identifiable items in your wallet or purse.
Limiting the amouont of personal information available to others includes reducing your <em>digital</em> footprint, and personal information items not required for your operational mission such as credit cards and other identifiable items in your wallet or purse.
Explanation:
A digital footprint is a person's online history, the trail a person leaves behind while using the internet. This trail is made up of websites and online shopping, activity on social media and even email records. The digital footprint can be tracked in a database and seen by other people, it is personal information available to others.