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: Jack Dorsey would have to give up his post at Square if he wants to become permanent CEO of Twitter. The company he helped found and now leads on an interim basis said Monday that it is only considering candidates who can make a 'full-time commitment to Twitter.' Dorsey was named interim CEO after Dick Costolo stepped down effective July 1 amid criticism over Twitter's disappointing financial performance and share price decline. Costolo had been Twitter's CEO for five years and led the company through a successful stock market debut in 2013. But Twitter has yet to make a profit and there are concerns about its ability to grow its user base.Costolo stepping down from his role beginning July 1Costolo faced controversies over online abuse and user numbersBoard only considering candidates who can make 'full-time commitment' 
 Question:While some analysts expect _ to be hired to the permanent post, this would mean giving up his job at Square, the payments startup, and Dorsey has not indicated that he would do this.

Jack Dorsey