It's C, I know because I got it wrong & it told me.
Answer:
to make agricultural tools and to make chains for suspension bridges
Explanation:
If the Confederacy had made a plan similar to the Anaconda Plan, the capturing of Washington D.C. and controlling California. The only event that will not happen if the Confederacy made the same Anaconda plan would be blockading Boston and New York.
The answer is the third statement.