I think it is 2)
Hope this help you?
Answer:
The inventor initially struggled to solve the problem, but she discovered an ingenious solution.
Explanation:
Coordinating conjunction is a type of conjunction used to join two or more words or phrases together. If there are two or more sentences as listed in this problem, we can use a coordinating conjunction to join the sentences together to form a single sentence. The revision of the two sentences using a coordinating conjunction is shown above.
Answer:
Most factory employees did not need education or skills to do their jobs.
Explanation: