Final answer:
C) Mr. Green is accused of breaking his oath to the Republican party by not voting for Eisenhower, a popular conservative candidate and war hero who secured the presidency in 1952 with a notable electoral victory.
Step-by-step explanation:
Based on the context provided, Mr. Green is accused of breaking an oath of allegiance to the Republican party by not voting for Eisenhower in the last election, according to Wadsworth.
Dwight Eisenhower, as a candidate, was widely popular for his military background and won the presidency in 1952 with a significant majority of the electoral vote, even carrying Southern states that had not voted Republican since Reconstruction.
His political stance was conservative, particularly regarding domestic policies, which differed from Truman's more liberal New Deal policies.