The correct answer to this open question is the following.
Although you did not attach options for this question we can say the following.
The artist who influenced the WPA Public Art Commission was Jackson Pollock.
As part of the series of programs created by President Franklin D. Roosevelt called the New Deal, one of the most important was the Work Progress Administration or WPA. Among others, this WPA included the Federal Art Project founded in 1935. The goal was to support the work of artists such as painters and designers who worked creating pieces of art o designing campaigns for other New Deal agencies. THe Federal Art Project closed operations in 1943.