What is the role of a 'form-fill-seal' (FFS) machine in packaging development?
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A
It forms a package from roll stock, fills it with product, and seals it in one continuous operation
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B
It forms rigid containers, fills them manually, then heat-seals lids
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C
It fills pre-made bags and forms a secondary seal after filling
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D
It forms corrugated cases and fills them with primary packages