In May 1974, the U. S. government initiated the Federal Design Improvement Program in response to a growing awareness of design as an effective tool for achieving objectives. One of the most successful federal visual identification systems was the Unigrid system, a standardized format developed in 1977 for the .

The correct answer to this open question is the following.

Although the question does not include options, we can say the following.

In May 1974, the U.S. government initiated the Federal Design Improvement Program in response to a growing awareness of design as an effective tool for achieving objectives. One of the most successful federal visual identification systems was the Unigrid system, a standardized format developed in 1977 for the United States National Park Service.

In those years during the time of President Richard Nixon's administration, the federal government became aware of the importance of having a good design and graphic communication system for its dependencies. So conscious of the importance of a professional visual system and proper communications guidelines, the government hired renowned designers to improve the visual identity of departments such as NASA, the US National Park Service, the Postal Service, and the Department of transportation.

the answer would be choice c, cave paintings.