The words that best reflect Lincoln’s formal diction are the ones in the second option: brought forth.
To bring forth means to cause something to happen or be seen or known. The phrase is usually used in formal contexts or in literature.
All of the other options have words that are not considered formal and can be considered of every-day use.
Answer:
the events that caused curle to discover two elements
Explanation:
I am not very sure but I would probably use on the other hand or therefore.