When conducting surveillance, what is a key factor to consider?

In the context of surveillance, recognizing the critical factors that can influence the outcome is essential for successful operations. Each of the elements highlighted in the options plays a significant role in the effectiveness of surveillance efforts.

Time of day is crucial because different times can present varying levels of visibility and activity. For instance, many subjects may have more consistent patterns during daylight hours, while nocturnal activities might require different approaches and tactics.

Weather conditions also significantly affect surveillance, as rain, fog, or snow can impair visibility and the ability to maintain covert observation. Adverse weather might provide cover but can also create challenges for equipment and clear observation.

The presence of other investigators is another consideration, as coordination and communication among team members are vital to avoid redundancy and ensure that the surveillance is comprehensive.

Since all these factors contribute to the overall strategy, successful surveillance operations require consideration of all aspects mentioned, making the selection encompassing all of them the most comprehensive and effective approach.