B. Common, everyday language Is your answer
The infinitive can appear by itself, or it can be part of a larger infinitive phrase.
Examples of infinitives:
To run
To walk
To cook
To understand
To make
It is a "inferential statistic." Inferential statistics seek to determine what a population might think or believe.
They both sound right but i think it's amongst
It is subjective because in research scientist usually write in detail.