Abingdon tortoise in Galapagos Islands became extinct within …1…after …2…were introduced on the island, apparently due to the greater browsing efficiency of the …3….
A. 1`-`a year, 2`-`Darwin finches, 3`-`tortoise
B. 1`-`a decade, 2`-`goats, 3`-`totoise
C. 1`-`a year, 2`-`goats, 3`-`goats
D. 1`-`a decade, 2`-`goats, 3`-`goats