(7) When a set of fingerprints is sent to a crime labroatory for identification. (8) The general pattern of prints is verified first. What is the BEST method of combining sentences (7) and (8)?

Even though this question does not have options, it can be answered easily.

The best method to combine the sentences is by adding a comma between them:

When a set of fingerprints is sent to a crime laboratory for identification, the general pattern of prints is verified first.

Explanation:

Sentence 7 is a subordinate clause, which is made clear by the fact it begins with the conjunction "when" and the fact that, on its own, it does not express a full thought. However, once we read it with sentence 8, we realize they complement each other. Sentence 8 functions as a main clause, making the thought expressed in sentence 7 complete. The best way to join the two sentences is by adding a comma between them. There is no need to alter anything else, since the appropriate conjunction is already in use.

explanation:

it's important for any number of settings.   but then i'm a retired teacher and my view may be biased.

it certainly will not weigh as a minus when applying to a college, while poor grades always work against you.

other factors are important like what you do to improve the community.