Your answer is A. i hope this hel<span>ped!!</span>
Explanation:
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The Egyptian Pyramids is one example of a construction made of large stones. HOWEVER, The question seems that there should be pictures included, but there is not. So I give an example to help however I can, Feel free to comment and give more context if you wish for further help.
Answer:
The United States began to provide significant military supplies and other assistance to the Allies in September 1940, even though the United States did not enter the war until December 1941.
Explanation:
Before the panama canal people from East coast of America who wanted to go to Asia had to either sail around south America which took months or sail towards Asia and go around Africa which took even longer. The panama canal was a short cut right in the middle of central America which cut navigation time in half. Hope I helped. :)