Which of the following factors caused an economic decline in the late 1960s and early 1970s? [Select all that apply.] Which of the following factors caused an economic decline in the late 1960s and early 1970s? [Select all that apply.] The exorbitant costs of the space race had placed a strain on the economy. Increased competition from imported cars and electronics made it more difficult for American corporations to keep up. The United States had gone from being the world's largest oil producer to depending on other countries for energy. Civil unrest and the demands of the Vietnam War had placed a strain on the economy