 
 <translate> People cannot travel by bird because no bird can hold the weight of a human on its back whilst flying.
So, the answer is Sentence A. <ibo> Ndị mmadụ apụghị iji nnụnụ eme njem n'ihi na ọ dịghị nnụnụ pụrụ ibu ibu mmadụ n'azụ ya mgbe ọ na-efe efe. Ya mere, azịza ya bụ ahịrịokwu A. 