Final answer:
The true statement is that web-based shopping and online self-service applications enhance accessibility and convenience for users, improving the shopping experience and expanding market competition.
Step-by-step explanation:
Among the presented options, the true statement regarding web-based shopping and online self-service applications is C) They enhance accessibility and convenience for users. These technological advancements have significantly transformed the marketplace by improving communication technologies and fostering globalization. Consumers now have the ability to procure goods and services from worldwide sources, at any time, which has increased competitive pressures on traditional retail outlets. Moreover, web-based applications allow for consumer interaction through customer reviews and serve various market segments, including both B2C (business-to-consumer) and B2B (business-to-business) platforms, greatly impacting how trade and transactions are conducted.