Significant. Fractional sounds like "fraction," which is typically meaning a value less than one, but not quite zero. AKA, very small.
The opposite of a very small change would be a very big change. Which is what a significant change is.
The answer should be A. Brazil’s democracy has many similarities to America’s democracy. Just took the test lol
Ask traBolic, he uses them all the time
Answer: The answer is most likely D.) I saw the dimpling river pass and be the sky's blue looking-glass; because in this phrase the metaphor is where the poet compares the river to a looking glass. Since this is a metaphor, the river is directly compared to a looking-glass, without the use of like or as.