47. The author mentions the results of flotation experiments on plant seeds (lines 6-7)most probably in order to _______.
(A) suggest that the long-distance dispersal of seeds is a process thatrequires long periods of time
(B) lend credibility to the thesis that air currents provide a method oftransport for plant seeds to Hawaii
(C) challenge the claim that ocean currents are responsible for thetransport of plant seeds to Hawaii
(D) support the claim that the distribution of plants in Hawaii is theresult of the long distance dispersal of seeds