Which aspect is included in 2 CFR 215 (A-110)?

The correct answer highlights the specific scope of 2 CFR 215, commonly referred to as A-110, which outlines the administrative requirements for federal grants and agreements with institutions of higher education, nonprofit organizations, and certain other entities. This regulation indeed includes provisions concerning debarment and suspension rules.

Debarment and suspension rules are critical components of federal funding, as they help protect the integrity of federal programs by ensuring that entities engaged in fraudulent or unethical behavior are excluded from receiving federal funds. This regulation sets forth the standards and processes to determine if an organization is ineligible for federal assistance due to previous misconduct, thereby reinforcing accountability in federally funded programs.

The other aspects mentioned—audit requirements, federal contract requirements, and cost principles for nonprofits—are important components of federal regulations but are covered under different parts of the Code of Federal Regulations. Specifically, audit requirements are outlined in OMB Circular A-133 (now covered under 2 CFR 200), federal contract requirements are detailed in the Federal Acquisition Regulation (FAR), and cost principles for nonprofits are also found in different sections in 2 CFR 200. Thus, the debarment and suspension rules remain a unique aspect included specifically within 2 CFR 215 (A-110).