Which of the following statements is correct?
a.
In the Stackelberg model, the first mover's ability to commit may afford it a big strategic advantage.
b.
In incomplete information games, another possible first-mover strategic advantage is the ability to signal.
c.
The incomplete-information model of entry deterrence has been used to explain why a rational firm might want to engage in predatory pricing.
d.
All of the above.