6. With respect to companies with golden parachute agreements, Machlin, Choe, and Miles found: a. The number of multiple takeover offers was significantly greater for firms that possessed golden parachute agreements than for those firms without such agreements b. A positive relationship between the size of the golden parachute agreement and the magnitude of the takeover premium c. Negative shareholder wealth effects after the adoptions of such agreements d. All of the above e. Both a and b f. Both b and c