The statement that "Most Americans at the time thought Coolidge was a splendid president" can be considered true. Calvin Coolidge served as president from 1923 to 1929 and was generally well-regarded during his administration, particularly for his policies that promoted economic growth. However, opinions about his presidency varied, and while many appreciated his hands-off approach to government and business, some criticized his lack of action on social issues and economics leading up to the Great Depression. Overall, though, he did have a strong base of support during his time in office.
So, the correct response would be true.