Answer be C.
Samantha is creating an article from the 1700s and 1800s. One source provides information from the 1900s to modern day, therefore doesn't work in this case. So the choice of C doesn't work.
Answer:
Until indicates when something will happen, begin, or end. Till means the same thing as until. Till is not an abbreviation of until—it's actually older than until—and it should not be written with an apostrophe.
Explanation: