Which Canadian political figure was a rival of John Diefenbaker?

The correct answer is Lester B. Pearson, who was a prominent Canadian politician and a rival of John Diefenbaker. Their rivalry was significant, particularly during the 1950s and 1960s when both were key figures in Canadian politics. Pearson, as the leader of the Liberal Party, opposed Diefenbaker's Conservative government on various issues, particularly in areas such as foreign policy, social programs, and economic strategy.

Pearson's approach to Canada's role in international affairs, including his emphasis on peacekeeping and diplomacy, contrasted with Diefenbaker's policies. This rivalry intensified during election campaigns, which shaped Canadian politics at the time. Pearson eventually succeeded Diefenbaker by winning the government after a prolonged period of Conservative rule.

The other figures listed are not directly associated with a significant rivalry with Diefenbaker in the context of Canadian political history. Sam Hughes was a Minister of Militia and Defence during World War I, and his era was earlier than Diefenbaker’s political prominence. Alfred von Schlieffen was a German field marshal known for his military strategy during World War I, and Arthur Currie was a Canadian general during the same war, neither of whom played a