Artifacts because they’re old relics
The Civilian Conservation Corps (CCC) was a public work relief program that operated from 1933 to 1942 in the United States for unemployed, unmarried men. Originally for young men ages 18–25, it was eventually expanded to ages 17–28.
The Works Progress Administration (WPA), which was renamed in 1939, as The Works Projects Administration was the largest and most ambitious American New Deal agency, employing millions of people (mostly unskilled men) to carry out public works projects, including the construction of public buildings and roads.
The Tennessee Valley Authority (TVA) was envisioned not only as a provider, but also as a regional economic development agency that would use federal experts and electricity to more quickly modernize the region's economy and society.
The correct answer to this question is letter B, since the overall goal of New Deal legislation such as the CCC, WPA and TVA was to create jobs for Americans.
Precambrian time, period of time extending from about 4.6 billion years ago (the point at which Earth began to form) to the beginning of the Cambrian Period, 541 million years ago. Precambrian time encompasses the Archean and Proterozoic eons, which are formal geologic intervals that lasted from 4 billion to about 541 million years ago, and the Hadean Eon, which is an informal interval spanning from 4.6 billion to 4 billion years ago. The Precambrian represents more than 80 percent of the total geologic record.