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 correct answer is B.There is no identification of the site's creator.
This means that it might not be reliable since you don't know who's written it.
Answer: I don't know if it's too late for me to answer but here you go:
It doesn't seem like he's pacing or moving around, it seems as if he's staying in one place while thinking and panicking.
Explanation: Because there isn't any info on whether he's moving or not and most likely he'll have consequences for doing so.