Whereas each employee of the Government of the United States is endowed with a measure of trusteeship over the democratic processes which are at the heart and sinew of the United States; and Whereas it is of vital importance that persons employed in the Federal service be of complete and unswerving loyalty to the United States. . . . Now, therefore . . . there shall be a loyalty investigation of every person entering the civilian employment of any department or agency of the executive branch of the Federal Government. —Executive Order 9835 The policy described in the passage most contributed to which of the following Cold War developments?  A. The rise of McCarthyism in the U.S. Congress  B. The establishment of the Truman Doctrine  C. The persecution of Republicans who supported the Korean War  D. The elimination of the House Un-American Activities Committee​