The Fischer projection for the monosaccharide ribulose is shown below.How may this monosaccharide be appropriately classified? 
Definitions:
Social Reinforcements
Positive or negative stimuli provided by others that increase the likelihood of a behavior being repeated.
Helplessness Theory
A psychological theory suggesting that individuals who believe they have no control over negative events are more likely to feel helpless and develop depressive symptoms.
Gender Differences
The distinctions in characteristics and behaviors typically associated with being male or female, influenced by biological, psychological, and cultural factors.
Cognitive Triad
A cognitive-therapeutic view of the three key elements of a person's belief system present in depression, focusing on negative thoughts about themselves, their world, and their future.
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