What is one advantage of top-down programming design?

It enables multiple programmers to work on the code at the same time.
Programmers can take advantage of abstraction to focus on specific tasks.
The same object can be used to process data from a variety of sources.
It presents a solution from start to finish.

Which best describes the role or restriction enzymes in the analysis of edna a. to break dna into fragments that vary in size so they can be sorted and analyzed b. to amplify small amounts of dna and generate large amounts of dna for analysis c. to purify samples of dna obtained from the environment so they can be analyzed d. to sort different sizes of dna fragments into a banding pattern that can be analyzed