Question

In the early 1800s, Englishman Abraham Darby invented a quicker, easier way to produce cast iron. In the 1850s, British engineer Henry Bessemer developed the first inexpensive process for mass-producing steel. These two events are an example of which type of relationship?
a. Correlation
b. cognation
c. causation
d. Contextualization

Answer 1

I believe the answer is: A.  Correlation 
There is nothing that mentioned the development of henry Bessemer's invention was made impossible only because of Abraham darby's invention.
Becaus of this, both inventions are only correlated with one another since they do not form a cause and effect relationship.