Reading Comprehension (RC) | Findings from several studies on corporate mergers and acquisitions du

Hi[url=https://gmatclub.com:443/forum/memberlist.php?mode=viewprofile&un=GMATNinja%5D%5Bb%5DGMATNinja%5B/b%5D%5B/url%5D, I thought question is asking the firms that are being bid and their stocks increased less value than the bidding firms? However E is opposite meaning that the bidding firm's stocks increased less value?
Could you kindly help clarify please? Thanks

According to the passage, during the 1970s and 1980s bidding firms differed from the firms for which they bid in that bidding firms

(A) tended to be more profi table before a merger than after a merger
(B) were more often concerned about the impact of acquisitions on national economies
(C) were run by managers whose actions were modeled on those of other managers
(D) anticipated greater economic advantages from prospective mergers
(E) experienced less of an increase in stock value when a prospective merger was announced