The message that the illustrator is conveying in this cartoon is that Literacy tests conflicted with America's Ideals of liberty because they were designed to keep Immigrants out of the country. Option A is right.
A good look at the cartoon shows that this is correct. On the image we have Uncle Sam and his family locked out at the other side of a big wall. The reason for this is due to the fact that they are not literate.
The wall is named literacy test. Passing the test is the main prerequisite to gain entrance. Therefore the only thing keeping Uncle Sam and his family out is the fact that they are not literate.
This is against the ideals of the US, which was built on liberty, freedom and was welcoming to all people regardless of race.
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