Which announcement below is most likely to result in an unexpected return?

Multiple Choice

• Statement by a firm that it has just discovered a manufacturing defect and is recalling its product

• Announcement that the CFO of the firm is retiring June 1 as previously announced

• A news bulletin that the anticipated layoffs by a firm will occur as expected on December 1

• Announcement that a firm will continue its practice of paying a $3 a share annual dividend

• The verification by senior management that the firm is being acquired as had been rumored