At which level of production does the company make the most profit?

A company makes profit at the Commerce level of Production.

Explanation:

Production process is a process of any organization which involves the production or manufacturing of the company's product. There are three basic levels in a production process. First is the primary level, in which the raw material is extracted and collected to be used in the production process. The second level is Secondary level in which the raw material is manufactured, constructed and assembled in the production facility. The third and the last stage is Commerce, in which the final product is delivered to the retailers and in turns to the customers finally. After this process of commerce, the profits are collected.

the correct answer would be b, when, queen, calder hall and london.

explanation:

we always capitalize words when a paragraph or sentence is starting, when an important name is used, when a place is being written, or simply when a noun is used, etc. so in this sentence, sentence is starting from 'when', so it will be written in capital letters. secondly, queen is considered to be an important person, so it will also be written in capital letter. next, the name of the town is mentioned, i-e calder hall, which will also be written in capital letters. in the last,   city name is being used, 'london', which will also be written in capital letters. so option b is the most appropriate one.