What does this frame reveal about the RF network in this area?

During a post-deployment verification, you are requested to troubleshoot an area where users are experiencing poor throughput. They are using data communication only, mainly from laptops. You captured the frame showing an incorrect FCS. This frame is typical of those that were captured by the analyzer.

What does this frame reveal about the RF network in this area?
A . One station seems to be streaming video, thus may have reserved significant bandwidth via admission control
B . Contention Free is in place in this network, which may starve some non-QoS stations from access
C . Multipath or excessive collisions seem to be an issue in this area
D . The AP seems to be too far to provide enough coverage to this area

Answer: C