Of the options that you have given in this question, the correct answer is A. Rubber was not a critical raw material in the early industrialization of the United States.
During the early industrialization of the United States, there was not as much need for rubber as there would later be. While rubber was used for some things, it was not yet as important as it would become. Rubber became much more important later in the process of industrialization. This was in the early 1900s when automobiles became a big industry.
The other issue with rubber is that it is not something that is produced in the United States. Rubber trees are tropical plants. They do not grow in the US. All of the other raw materials mentioned in this question are present in the United States.
Thus, A is the best answer because rubber was not grown in the US and because it was relatively less important than the other four materials in the early period of industrialization of the US.