Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: A shocking new video appearing to show at least 30 Christians being beheaded and shot by ISIS in Libya has been released. The 29-minute video, titled 'Until It Came To Them - Clear Evidence', shows dozens of militants holding two separate groups captive, thought to be in the south and the west of the country. At least 16 men, described by Islamic State as the 'followers of the cross from the enemy Ethiopian Church', are lined up and shot in a desert area while 12 others are filmed being forced to walk down a beach before being beheaded. This follows another video in February of the beheading of a group of 21 Coptic Christians on the beach in Libya, though that terrain was rockier than the one shown in the latest film.Video seems to show militants in Libya holding one group of at least 16 captive on a beach and 12 others in a desertBefore the killings a masked fighter in black brandishes a pistol as he vows to kill Christians if they do not convertEthiopia unable to confirm its citizens were killed by militants in the footage but condemned the 'atrocious act'It comes two months after 21 Egyptian Christians were beheaded by extremists in a similar video from Libya 
 Question:_'s options to retaliate remain slim, given its distance from Libya.

Ethiopia