For Part A, the group that most likely opposed the Progressive reform efforts of Governor Parker is:
B. owners of large utility companies and drilling interests
Progressive reforms often aimed at regulating corporations and addressing issues like monopolies, which would likely be opposed by owners of large utility companies and drilling interests.
For Part B, based on Source 2, the statement that best explains how Louisiana parishes reacted to the temperance movement is:
C. Citizens came together in many parishes to ban the sale of alcohol.
This option suggests a cooperative response among citizens towards the temperance movement, reflecting collective action within the parishes.