SAT English Practice Question

In the early 1900s, the study of genetics was just beginning, and the field was still relatively new. Some scientists believed that genes were carried on chromosomes, while others believed that genes were carried on something else. It was not until the 1930s that scientists began to understand how genes are organized on chromosomes. Some scientists thought that genes were arranged in a linear fashion, while others thought they were arranged in a circular fashion. What is the most likely reason why there were conflicting views about the organization of genes in the early 1900s?

1. A.the lack of available technology to study genes.
2. B.the lack of a consensus about the nature of genes.
3. C.the lack of knowledge about the structure of chromosomes.
4. D.the lack of understanding about the process of inheritance.