Answer:
a strong vertical structure to one emphasizing stronger horizontal coordination
Step-by-step explanation:
Since in the question, it is mentioned that the for rapidly growing of the company leads to change its structure also the employees grouping could be done in different team this is to be done due to improvement in the cost, quality, service, speed, etc
So here the company shifted it from a strong vertical structure to the horizontal as the changes are made that became beneficial for the company