Which of the Following Explains the Lack of Indigenous Land

Which of the following explains the lack of indigenous land mammals in New Zealand and the Pacific islands?

A) The arid climates and poor soils could not support adequate floral habitats.
B) They were never connected via land to the Eurasian landmass.
C) Species introduced by Europeans drove native species to extinction.
D) For spiritual purposes, native islanders eliminated their presence.