The correct option is
B Modern synthetic theory
Neo-Darwinism is known as a modern synthetic theory. It is a combined form of the evolutionary theory of natural selection and modern population genetics. It was developed during 1930 and 1940. It stated that the inheritance is caused due to the inheritance of genes. At the same time, the naturally selected genes from the pool get inherited and allow the development of characters which helps the organism to adjust to the surrounding.
So, the correct answer is option C.