The correct answer is A) signing the Payne-Aldrich Tariff.
The action of President Taft that angered the progressives in his party was the signing the Payne-Aldrich Tariff.
Not all decisions that a US President makes are supported by the members of his party. That was the case of President William Taft when he signed the Payne-Aldrich Tariff of 1909 that raised tariffs of products imported in the United States such as coal an iron. The decision created a division in the Republican party. Some members of his party were really angered with Taft and did not support him in his reelection. The party was divided and Taft lost the election against Woodrow Wilson.