To be able to better compare stock performance within the same industry, similar companies are grouped into?

A) market sectors

B) industry blocks

C) performance sectors

D) average earning blocks

B. As they will have the same common business activity to their competitors

The correct answer would be B, Industry Blocks.

Explanation:

When there are companies in a market who offer similar products or services to the consumers, they are said to be operating in the same industry. For example, if there are some companies which provide the telecom facility to the people, they can be grouped together as one industry, The Telecom Industry. So when the performance of the stocks within the same industry is required to compare, then such companies are grouped together which are called the industry blocks. So option B is the appropriate answer.