Answer: a. The War Production Board helped factories quickly shift from only making consumer goods to making war materials.
Explanation:
A key part of the U.S. being able to join the Second World War and contribute so effectively in the time that it did, was the War Production Board's efficiency in shifting American consumer production to war materials for use by the U.S. military and the Allies.
Thanks to the Board, companies shifted their focus from consumer goods even though there was initially some massive pushback. Following a national campaign, opposition subsided and the U.S. was able to pump out so much war material that the war would not have been won without.
Lack of incentive - The lack of incentive among the colonists to complete important tasks led to the tasks not getting done. Many settlers were "gentlemanly" - Since most of the settlers considered themselves "gentlemanly", they considered the hard work of a settler "beneath" them and consequently did not get most of the basic things needed to survive done.
Expectations of finding gold - The expectations of finding gold (and mining it) led to people neglecting things such as gathering food, setting up shelter, etc. Location - The location that the settlers chose to settle in at was great for defending against naval incursions but terrible for living conditions. Bad Relations with Natives- The relations with the local Native Americans(which were all mistakenly grouped up into the Powhatan Indians) were not as good as they could be; if they had had a better relationship they could have traded for food and/or shelter which could have led to lower mortality rates
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The second one. The canal helps ships stay on sea level