Answer:
d.
Explanation:
Based on the provided choices, the sentence that must be included would be "This restructure will involve partitioning units and redistributing our customers to new developers. OP and SG will have dotted line relations to PPR and SLG." This sentence clearly explains the entire restructuring process and the reason for doing so, while at the same time letting employees know that their departments (hence the employees) will still have a relationship to the new units and developers, therefore keeping their jobs.