A company has installed a new state-of-the-art motion detection system within their high-security data center. Despite being calibrated during installation, the system persistently generates alerts during certain times of the evening, though subsequent investigations confirm the absence of unauthorized personnel or movement. Which of the following factors should the security administrator investigate FIRST as a probable cause for these false alerts?
Fluctuations in the data center's temperature resulting from the HVAC systems cycling on and off
Slight movements of the false ceilings due to their lightweight material and design
Adjustments in the lighting schedule causing changes in shadow patterns
The growth and slight movements of large office plants placed near the sensors