42 As the ability to travel over great distances becomes easier, the spread of communicable diseases becomeseasier.
(A)Transferable diseases will stop spreading if human beings’ ability to traverse oceans and mountainsincreases.
(B)The extent to which people move across places is not necessarily related to the increase of infectiousdiseases.
(C)The higher the ability of people to go from one place to another, the less likely is the spread oftransmissible diseases.
(D)Human mobility seems to increase the possibility of spreading diseases.