单选题 It can be inferred from the passage that the author believes which of the following concerning the top-down method of nanotechnology?

• (A) The top-down method tends to be accurate but highly inefficient, resulting in a process that takes a great deal of time and energy.
• (B) The top-down method, unlike the bottom-up method, tends to disobey the rules of many chemical interactions.
• (C) The top-down method requires a greater level of technological involvement than does the bottom-up method.
• (D) The top-down method shows the limits of nanotechnology methods that rely too heavily on parallel processes.
• (E) The top-down method is fairly useless when applied to the problem of creating a single molecule.