Wrapping paper is extremely fragile and has a demand that spikes dramatically at the end of each year. it is not possible for manufacturers to ramp up and produce exactly what is needed right before demand occurs, so wrapping paper is produced year-round and sent to a storage facility to be stored alongside other items until demand occurs. this technique is:
a) postponement warehousing.
b) hub and spoke warehousing.
c) break-bulk warehousing.
d) assortment warehousing.

D) assortment warehousing.

Explanation:

Based on the information provided within the question it seems that this technique is called assortment warehousing. These are warehouses specifically designed to house products that are being stored for long periods of time until customer demand for those products rises. Such is the case with wrapping paper since demand is low until the holiday season where it drastically increases.

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