German scientists were concerned about nazi restrictions on uranium sales because a) uranium would not be available for industrial research b) uranium was important to german missile programs c) uranium paid for german scientific research d) uranium could be used in research on atomic weapons

D) uranium could be used in research on atomic weapons

Explanation:

The Uranium Project is the key name of the nuclear energy project developed by the Department of Weapons Development of the Wehrmacht during the Second World War for the use of it in the manufacture of the atomic bomb. The German nuclear power project is informally known as the Uranverein ('Uranium Club') and began a few months after the discovery of nuclear fission.

German scientists were concerned about Nazi restrictions on uranium sales because uranium could be used in research on atomic weapons (D).

The Nazi party controlled Germany through a dictatorship between 1933 to 1945, under the leader, Adolf Hitler. During this time Nazi scientist had tried built a nuclear reactor. But this project failed due to a shortage of uranium for the reactor.  

The German nuclear weapons project known as the Uranverein (Uranium project in English) was a project to develop and produce nuclear or atomic weapon during World War II. The first effort was in April 1939, after the discovery of uranium fission in a nuclear reactor. The second project was started on 1 September 1939.  But then the nuclear weapon project split into the areas of uranium and heavy water production, uranium isotope separation, and the nuclear reactor.

Uranium

Uranium

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Keywords: uranium, Nazi nuclear reactor program, research on atomic weapons, Germany nuclear reactor program.