From the options given below, select the option which states the correct combination of correct sentences.
I. Having completed the preliminary survey last month, the committee has already finalized its recommendations and submitted them to the concerned authorities for further action. 
II. The newly introduced policy, which aims to regulate digital transactions, has been receiving widespread criticism due to its ambiguous guidelines and lack of clarity. 
III. The organization has been working on multiple projects simultaneously, but none of them have yielded any significant outcome so far. 
IV. The research paper, despite being reviewed by several experts in the field, still contains errors that needs immediate correction before publication.