Answer: Autocratic
Explanation: In simple words, Autocratic leadership style refers to a management style under which all the decisions are made by a single person with the ultimate authority. Although, the input from others could be taken into consideration.
In the given case, Dave made a hiring committee to employ new individuals. However the final decision for hiring was to be made by the head of public relations.
Hence we can conclude that the given case illustrates autocratic leadership style.