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Read the text and answer the question by selecting all the correct responses. More than one response is correct.

An even additional exciting notice was reported in 1994, conjointly from West Pakistan. The currently extinct whale Ambulocetus natans (“the walking whale that swam”) lived within the Tethys ocean forty nine million years agone. It lived around three million years when Pakicetus however nine million before Basilosaurus. The fossil fortuitously includes an honest portion of the hind legs. The legs were sturdy and led to long feet substantially like those of a contemporary pinniped mammal. The legs were actually practical each toward land and puzzled. The whale preserved a tail and lacked a fluke, the main suggests that of locomotion in fashionable cetaceans. The structure of the backbone shows, however, that Ambulocetus swam like fashionable whales by moving the rear portion of its body up and down, although a fluke was missing. the massive hind legs were used for propulsion in water. On land, wherever it most likely bred and gave birth,Ambulocetus might have touched around substantially sort of a fashionable eared seal. it absolutely was beyond question a whale that connected life toward land with life puzzled.

Q. Why does the author use the word “luckily” in mentioning that the Ambulocetus natans fossil included hind legs?

(A) Fossil legs of early whales are a rare find.
(B) The legs provided important information about the evolution of cetaceans.
(C) The discovery allowed scientists to reconstruct a complete evolution of the whale.
(D) Until that time, only the front legs of early whales had been discovered.

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