Context effects illustrate that our perception of particular stimuli is influenced by the ________ of those stimuli.

A) absolute threshold
B) subliminal sensation
C) just noticeable difference
D) environmental surroundings

Context effects refer to the influence of environmental surroundings on perception. The way we perceive a stimulus can be affected by the surrounding stimuli and the context in which it is presented. Therefore, D is the correct answer as it refers to environmental surroundings. A, B, and C are incorrect as they do not refer to the influence of context on perception.