The answer is D. It provided a source of transportation for goods and people
Fingerprint matching is determined through unique characteristics. To achieve it must have certain ridges. loops and whorls. The characteristic points are then compared to the prints on the system. When forensics finds that there are enough similar matching points, they state whether they are fingerprints in which they match or not.
It is assumed that prints are one hundred percent positive, that is their use is one hundred percent successful with a zero error.
However, the prints are not considered scientific evidence, but it is still a presumption. There is never a hundred percent matching the prints, but just the similarity within the prints.
You will have to look at whether or not the creator of the source had a really positive or negative outlook on the situation.
If they are -for example- great friends with a bully, they will not tell as much of the truth, but if they are enemies, they may tell a very exaggerated truth to get them in trouble.
You must look for a very neutral feeling on both sides of the matter. If the author has an opinion, more likely than not it will affect the way they share the information
Sowwy man i just needed the points