Final answer:
William McKinley believed that continuing Republican policies would lead to economic growth and benefit working-class voters by ensuring the stability of currency and credit.
Step-by-step explanation:
William McKinley believed that if Republican policies were continued, it would lead to economic growth and benefit the working-class voters. He supported conservative business interests and the gold standard, which he believed would ensure the soundness of currency and strengthen America's international credit. McKinley's campaign emphasized the positive aspects of the gold standard and painted Populism as destructive to industry and currency.