Unrestricted submarine warfare (on merchant ships) and the sinking of the RMS Lusitania.
The act was about ensuring people have voting rights and preventing states from preventing voting rights in various ways such as having literacy tests or voting taxes or anything similar. One effect can be that it enabled for all people to vote regardless of color or origin, and another is that it enabled minorities and immigrants to vote too because it enabled minorities who didn't know English that well to vote using bilingual ballots.
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The answer is C.
As a science website says, "Scientists think they know why the Ancestral Puebloans disappeared. The primary culprit, studies suggest, was a megadrought that would have made it impossible to grow enough food to feed the tens of thousands of people living in the region."
If you didn't know, drought represents the lack of rain.
The answer is d the bill of rights