A problem associated with the passage of federal air control standards was:

The correct response highlights a significant challenge related to federal air control standards—namely, the reliance on voluntary compliance by states. This aspect is crucial as it indicates that while the federal government can establish air quality standards, the responsibility for enforcing these standards often rests with state governments. States might not prioritize compliance due to various reasons such as budget constraints, differing political interests, or varying levels of public health concern. Consequently, this reliance can affect the overall effectiveness of federal air control measures since compliance can be inconsistent and, in some cases, inadequate, ultimately undermining the intended improvements in air quality.

In contrast, while other options present valid concerns regarding air quality standards, they represent different issues. For instance, the proposition that standards were set too high does not necessarily account for the rationale behind setting ambitious goals aimed at improving air quality. Similarly, compliance dates being too rapid for states to meet can reflect urgency in addressing air pollution, though it does not directly address the overarching problem of enforcement and adherence at the state level. Lastly, the lack of "teeth" for enforcement speaks to the adequacy of punitive measures rather than the fundamental structure of compliance and accountability at the state level that is affected by voluntary adherence. Each of these aspects is critical but demonstrates a