The answer is B, as the sentences do not show cause and effect, set up a comparison, or introduce an idea that has already been brought up.
Abrupt end because of knee problems?
The correct option is A.
From the passage given above, it can be seen that the brothers were opposites right from their mother's womb. One is left handed while the second one is right handed, this probably make them to see matters from different angles. Thus, it is inevitable that the brother will always be in conflict.
