Answer:
a. the overconfidence of leaders in their ability to create value by acquiring another company.
Explanation:
The hubris hypothesis -
It means that the average rise in the target of the firm's market value , should always be more than the average reduction in the bidding firm's value , it is considered when there is no gain available to the corporate takeovers .
It is the leader's overconfidence for their ability to create value by acquiring any other company .
Hence , from the given information of the question the correct answer is ( a ) .