Which of the following was a strategy used by the naacp to challenge racial discrimination apex

The strategy used by the NAACP to challenge racial discrimination is a legal ground in a series of cases such as lawsuits and rights under the 14th and 15th Amendments. In addition, the lawyers adopted these strategies based on the test case, political contexts and doctrinal analysis in all of their arguments.

the american rail road was the most influential and useful transportation system developed in the 1800's with steam locomotives and in the very late 1800's and early 1900's diesel electric locomotives being used to transport goods and people around the newly expanded united states!