I will mark brainiest if u give me a explanation and an absolute correct answer, PLeasee help meee Read the paragraph below. Which transitional word or phrase belongs before sentence 8?

(1)in October 2010 researchers captured something astonishing on video (2)it was in the end small area of a forest on the island of Sumatra Indonesia (3) video showed 12 Sumatran Tigers over a short period of time (4)one video shows three young Cub playfully chasing a leaf (5) another record adult tiger strolling across a clear at night (6)still another video showed two Cubs and their mother approached and sniff the camera before moving on (7)the researchers said that these images are a sign that the forests must be protected (8) is the woods are cut down the Sumatran Tigers already critically endangered could disappear.

Read the paragraph below. Which transitional word or phrase belongs before sentence 8?

A. In fact,
B. Evidently,
C. Obviously,
D. For the same reason,