You make an online purchase of a hooded sweatshirt with the logo of the dallas cowboys. the next time you log on, your screen has a banner ad for dallas cowboy hats and shirts. this banner ad is most likely the result of a. the internet crime of theft of private information b. coincidence c. data mining d. encryption software

data mining

Explanation:

Yes, it's most likely the result of a tracking method of some kind, used by the online advertising agencies.

Let's see the possible answers given:

a. the internet crime of theft of private information

No, your data has not been stolen, your visits were just recorded.  They know the user of your computer has showed an interest in Dallas Cowboys merchandise, but they have no idea of  your name, credit card number, and so on.

b. coincidence

No. Online ads don't happen by coincidence.  The ads agency will not present you just any random ad, they want to maximize the chances you will click on it (that's how they make money)... so they tailor the ads they present you based on what they know of you.

c. data mining

Yes, by digging in their database, they know you've shown a recent interest in Dallas Cowboys merchandise, so they consider you might still be interested in that.  

d. encryption software

No.  The encryption part is to prevent unauthorized access to your data...  so it cannot be linked.

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if it is for a job, then you should learn everything you can about the job, like what does it involve, what qualification is required and how you are the right person for that job. dress appropriately for the interview. get plenty of rest the night before. good luck!