Retailers order hand sanitizer that is poured into containers and labeled, packed in boxes, shipped to a distribution center, and delivered to retailers. Suppose the cardboard box company was affected by COVID$-19$ and closed its doors for several weeks. This example shows that, during the $2020$ COVID$-19$ pandemic, there was a breakdown of $.$

A$.$ the supply chain

B$.$ quality ownership

C$.$ outsourcing

D$.$ business process reengineering

E$.$ operations control