When did a group of FFA officers and members make a pilgrimage to Washington, D.C., to meet President Franklin D. Roosevelt?

The correct choice indicates that the meeting between a group of FFA officers and members with President Franklin D. Roosevelt occurred in 1933. This event was significant in the history of the FFA as it represented the organization's growing influence and recognition at the national level.

In 1933, the FFA was just beginning to establish itself as a prominent organization dedicated to agricultural education, leadership, and community service. Meeting with the President highlighted the relevance of agriculture in the nation's economy, especially during the challenging times of the Great Depression. FFA members used this opportunity to discuss the importance of agricultural education and the need for support and resources for farming communities, which was particularly vital during that period in American history.

The other years mentioned do not coincide with any documented meetings between FFA representatives and FDR, making 1933 the pivotal year for this encounter that symbolized the organization's aspirations and the vital role of agriculture in America at that time.