Final answer:
Truthful advertising of product features (Option C) is not considered a deceptive practice under the DTPA, while false representation, failing to disclose information, and breaching warranties are.
Step-by-step explanation:
Under the provisions set forth by the Deceptive Trade Practices Act (DTPA), there are specific engagements that are considered misleading or deceptive. Among the listed practices, the ones that are deemed unlawful include: A) False representation of goods or services, B) Failure to disclose information about goods or services, and D) Breach of warranty.
These all constitute deceptive practices as they either provide incorrect information or omit important details that could mislead a consumer. However, C) Truthful advertising of product features is not included as a deceptive practice under the DTPA since it pertains to honest and factual information provided to consumers.
The Federal Trade Commission (FTC) permits a certain amount of exaggeration in advertising but requires factual claims to be accurate. Moreover, caveat emptor, which means 'let the buyer beware', cautions consumers to be vigilant about the claims and promises made in advertisements.