When a manufacturer acquires ownership of raw material suppliers.

(C) option is the right answer and it is the form of vertical integration.

 backward integration is the right answer

C) Backwards Integration

A form of vertical integration that involves the purchase of suppliers. Companies will pursue backward integration when it will result in improved efficiency and cost savings. For example, backward integration might cut transportation costs, improve profit margins and make the firm more competitive.

C) Backwards Integration..............................................................................>>>>>>>>>>>>

   C) Backwards Integration

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C) Backwards integration

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Agree with Mr. Haris

D. Forwards integration

Of course, it s a form of vertical integration but, the manufacturer would be selling the goods directly to the local market instead of distributor.

I think the answer is Option D-Forward Integration, Mr. Wasi ,please correct me, if my answer is wrong

Forward Integration is a strategy where a firm gains ownership or increased control over its previous customers (distributors or retailers).”

 Thanks to all  for giving  valuable views and answer

Backward integration. SCOR Model - Make Source Deliver

My first impression would have been vertical integration, and yet the most correct is definitely backward integration.  Thank you Alfredo for your comprehensive answer which enrich us all.