This question does not provide any specific information or context, making it difficult to determine the correct answer. However, based on the given options, let's analyze each one to understand why option 'B' might be the correct choice.

a) No information is provided about option 'a'. Without any context or details, it is not possible to determine if this is the correct answer.

b) Option 'b' is stated as the correct answer. However, without any explanation or context, it is unclear why this option is correct. More information is needed to understand the reasoning behind this choice.

c) No information is provided about option 'c'. Without any context or details, it is not possible to determine if this is the correct answer.

d) No information is provided about option 'd'. Without any context or details, it is not possible to determine if this is the correct answer.

To provide a more accurate answer, additional information or context is required. It is important to provide specific details, such as the question prompt or any relevant background information, in order to analyze and explain the correct answer.