Which of the following are acceptable Fischer projections for S-alanine, NH2CH(CH3) COOH? 
Definitions:
Crawling
The act of moving forward on hands and knees or by dragging the body close to the ground, typically a developmental milestone in infants.
Creeping
The slow, gradual movement or development of something, often unnoticed until it has become significant.
Locomotive Development
The progression of physical abilities in infants and young children, enabling them to move from one place to another, such as crawling, walking, and running.
Ulnar Grasp
An early motor skill in infants where objects are grasped with the entire hand, using the palm and the ulnar side (near the little finger).
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