Final answer:
For companies with weak or overlapping cultures, integration is the strategy that allows for the merging of cultures while respecting each culture's unique aspects, akin to pluralism's salad bowl concept.
Step-by-step explanation:
When companies with relatively weak cultures or when their cultures include several overlapping values, the strategy to merge organizational cultures that should be considered is integration. Integration allows for the combination of different cultural attributes, respecting the uniqueness of each while creating a new, shared culture. This approach is in contrast to assimilation, which implies that the less dominant culture gives up its identity to conform to the dominant culture's values and practices. Under conditions of integration, both cultures can maintain some of their original traits while adopting some from each other, promoting diversity and creating a more inclusive environment like the salad bowl concept found in pluralism.