An advertisement that offers a discount must be sold under what condition?

When an advertisement offers a discount, it is essential that the product is sold for that price during the duration of the advertisement's effectiveness. This requirement ensures that consumers are not misled about the price they can expect to pay. If the price advertised is not honored, it can lead to significant customer dissatisfaction and potentially damage the reputation of the business.

By ensuring that the product is available at the advertised discounted price while the ad runs, it establishes transparency and trust with potential buyers, fulfilling ethical advertising practices. This condition also aligns with consumer protection laws that demand that advertisements be truthful and not misleading, which is critical in maintaining a fair marketplace.

In contrast, the other options relate to specifics that are not inherently required when an advertisement provides a discount. While stating the condition or size of the unit can provide important information to the buyer, these details are not as crucial as the requirement to honor the advertisement pricing during its effective period. Additionally, the stipulation regarding 60 days post-advertisement is not a standard requirement associated with discount advertisements, making the need to sell at the advertised price during the ad's active timeframe the primary focus.