Gunther posted an expensive item on an online auction site. Dominic offers the highest bid and sends payment to Gunther. Gunther then refuses to send the product to Dominic. Gunther has committed:

a. online auction fraud. b. online retail fraud. c. online network fraud. d. phishing.

online auction fraud.

Explanation:

Since Gunther organised bid for the item on online platform its online action.

But he did not deliver item to person who won the bid and made the payment as well. Hence this is online auction fraud.

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d. the polar jet stream   lies between the polar easterlies and trade winds should be your answer