The correct options are
C Modern Evolutionary Synthesis
D Neo - Darwinism
Although Darwinism turned out to be the most widely accepted theory of evolution for a long period of time. But, microevolution (evolution at the genetic level such as mutations) and macroevolution (evolution at the level of a wide taxonomic group) could not complement each other. Thus, scientists working in different areas of life sciences came up with an explanation of evolution by merging both the ideas. This came to be known as the Modern Evolutionary Synthesis or Neo-Darwinism. According to this theory, microevolution leads to macroevolution.