Perceiving machines" are used by the U. S. Postal service to "read" the addresses on letters and sort them quickly to their correct destinations. Sometimes, these machines cannot read an address, because the writing on the envelope is not sufficiently clear for the machine to match the writing to an example it has stored in memory. Human postal workers are much more successful at reading unclear addresses, most likely because of:.A. Bottom-up processing.
B. Top-down processing.
C. Their in-depth understanding of principles of perception.
D. Repeated practice at the task.