How do mentors provide professional development opportunities?

Giving orders about what to do and what not to do
Sharing job skills, experiences, and expertise
Telling funny stories to make mentees feel comfortable
Writing down all their advice in an online blog

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