Which of the following is an example of a common scam?

Price gouging during emergencies is classified as a common scam because it involves charging excessively high prices for essential goods or services, particularly in times of crisis when consumers are vulnerable. This practice takes advantage of consumers' urgent needs, such as during natural disasters or public health emergencies, and exploits the circumstances for profit. It is considered unethical and is often illegal in many jurisdictions, as it can lead to undue hardships for individuals who are already facing difficult situations.

In contrast, grocery coupons, online banking services, and consumer education workshops are legitimate consumer practices that aim to provide value, convenience, and knowledge without exploiting individuals. These options do not involve deceit or manipulation, focusing instead on assistance and enhancing the consumer experience.