For your first question, the statement that BEST describes the artist's comparison between President Lyndon Baines Johnson and President Franklin Delano Roosevelt is:
D. Both initiated large-scale social programs.
This compares their efforts to address social issues through significant government programs.
For your second question, the accomplishment that LBJ could boast as a comparison to that of FDR is:
A. Medicare.
Medicare is a significant social program that LBJ championed, similar to the New Deal programs initiated by FDR.