The correct answer is:
B. Many traditionally Democrat voters supported Ronald Reagan.
Explanation:
After President Jimmy Carter's administration, many Democrats supported Ronald Reagan in both of his terms (1980 and 1984).
There are many theories of why Democrats supported Reagan, but one of the main reasons was that Ronald Reagan was a former Democrat, Reagan himself said his party had abandoned him, and many Democrats felt that way for reasons like the economic crisis, the assassination of one president, the resignation of another and the increased crime rates.
Ronald Reagan optimistic tone inspired confidence in people and gained their votes even when they didn't agree with all of his policies, this group of people were called "Reagan Democrats".