The author's attitude toward the efforts to control senior executives would be ______.

A．boardroom reforms have failed to achieve the desired result
B．outside board directors tend to be more independent
C．with a boardroom full of outsiders, senior managers work more conscientiously
D．cooperation between senior managers and board directors suffered from the reforms

A．efforts to conquer
B．attempts to win over
C．exertions to understand
D．endeavors to increase profits