Final answer:
The juxtaposition of a smiley face with blood creates a sense of irony, as it contrasts a symbol of happiness with one that suggests violence or injury, thereby eliciting a sense of unease and highlighting societal dualities.
Step-by-step explanation:
The effect of juxtaposing a smiley face button with the blood surrounding it is a) It creates a sense of irony. This is because the smiley face typically symbolizes happiness and positivity, while blood can represent injury, violence, or death. Placing these two starkly contrasting elements side by side creates a powerful visual rhetoric, evoking emotions that are deeply interwoven with sociology and psychology. The irony is derived from the clashing connotations of the symbols used - the cheerful icon of the smiley is starkly contrasted with the serious and sobering reality suggested by blood, which can instill a feeling of unease and highlight the dissonance between innocence and violence. This contrast also underscores the dualities within society and can lead to a strong impression on the viewer, as they are forced to reconcile the contrasting imagery.