Step 1: Understanding the Question:
The Consumer Protection Act (CPA) 2019 replaced the old 1986 Act to modernize consumer rights, especially for the e-commerce era.
Step 2: Detailed Explanation:
• A. Scope: The act covers \enquote{Defects} (physical flaws) and \enquote{Deficiencies} (faulty service).
• B. Product Liability: A new feature of the 2019 Act. It allows consumers to seek compensation from a manufacturer or seller for any harm caused by a defective product.
• E. Redressal Tiers: The Act provides a 3-tier quasi-judicial machinery: District, State, and National commissions.
• Exclusion: Statement D is incorrect because \enquote{Supreme Court} is not a commission tier; it is the final appellate body after the National Commission. Statement C (\enquote{Deficiency in marketing}) is not a standard legal term used in the Act; the focus is on \enquote{Unfair Trade Practices}.
Step 3: Final Answer:
The benefits are A, B, and E.
Thus, the correct answer is D.