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: Saudi Arabia, the United Arab Emirates and Bahrain announced Wednesday the withdrawal of their ambassadors from Qatar because Doha had not implemented an agreement among Gulf Arab countries not to interfere in each others' internal affairs. The three countries, which are all part of the Gulf Cooperation Council (GCC) along with Qatar, announced the unprecedented move in a joint statement. They said GCC members had signed a deal November 23 that included "a security agreement and a commitment to the principles that ensure non-interference in the internal affairs of any of the GCC countries, either directly or indirectly, and not to support any activity that would threaten the security and stability of any of the GCC countries from organizations or individuals, including support for hostile media."Qatar expresses "regret and surprise" at the decisionSaudia Arabia, UAE, Bahrain announced the unprecedented move in joint statementThey say Doha has not implemented a security agreement among Gulf Arab countriesTensions between Qatar and other Gulf countries have increased in recent years 
 Question:"Saudi Arabia, _ and Bahrain hoped that the agreement will be implemented, however, after more than three months after the signing of the agreement, Saudi Arabia, UAE and Bahrain feel that the State of Qatar did not take the necessary actions to put it into practice," a statement on the Saudi Foreign Ministry Facebook page said.

United Arab Emirates