While using a popular videoconferencing program, the user selects a webcam, but the software is unable to open the webcam. The webcam was working the previous day. Which of the following should be done to address this issue?


A. Close other video software and retry.
B. Adjust the conference software to a compatible resolution.
C. Switch the video from the webcam to "conference" mode.
D. Reseat or replace the webcam.