Which one of the following is not a potential concern associated with the use of biotechnology

The production yields of GM foods

Biotechnology is the application of biology to technology. This technique combines the two disciplines together to formulate a better integrative system of functioning mechanisms for further medicine and other purposes. 
Cloning is a type of biotechnology wherein a specific subject or living subject is copied at the same DNA level -morphology, physiology and organismic whole hence, identically similar with one another when two subject are produced. 

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey