Read the passage from a letter by Christopher Columbus. The inhabitants . . . are well made, but because they are timid and full of terror. . . . But when they see that they are safe, and all fear is banished, they are very guileless and honest, and very liberal of all they have.

–Letter to Gabriel Sanchez, Christopher Columbus

Which action is the best way to verify the passage from the letter?

Read the rest of the letter.
Examine if the letter is relevant.
Find evidence to corroborate the letter.
Determine if the letter is a primary source.

b or c im pretty sure

the industrial development of cities in the ruhr area in the nineteenth century is described. the research was based on english and german language sources. several factors that shaped growth and paths of the cities were categorized and analyzed. they are locations, resources, traditions, entrepreneurs, and technological developments. locations and resources were the most important among them; other factors may be regarded as consequences from locations and resources. among the cities, bochum, essen, gelsenkirchen, and dortmund had the richest resources and most favorable locations in the transportation network and grew to be the largest cities in the ruhr area near the end of the nineteenth century. riverside location was also a favorable factor for the development, as shown in the development of duisburg on the confluence of rhine and ruhr. resource distribution can explain the rise of textile industry, metallurgical industry, and coal and iron industries, and the northward progression of the mining industry. tradition was an important factor for cities such as krefeld, barmen, elberfeld, solingen, and remscheid, which experienced development based on their traditions through the nineteenth century. various entrepreneurs exerted influences within and beyond the local level over the ruhr area. technological development stimulated the northward progression of the mining industry and the deep connection between the coal and the iron industries.

the answer would be a).