The correct answer is: C. Either I or II is implicit.
The statement is an advertisement for Avon Cycles. It claims that Avon Cycles are fast, easy to ride, impressive, reliable, crafted, and have up-to-date automation. These are all positive qualities that would make someone want to buy an Avon Cycle. However, the statement does not provide any evidence to support the claim that Avon Cycles are the only cycles with these qualities. It is possible that there are other cycles that have all of these qualities, or that some of these qualities are not unique to Avon Cycles.
The statement also does not provide any evidence to support the claim that people do not bother about the cost of Avon Cycles. It is possible that some people would be willing to pay a high price for an Avon Cycle, while others would not.
Therefore, both assumption I and assumption II are possible, but neither assumption is necessarily true.