The Decision to Ally with the United States to Invade

The decision to ally with the United States to invade Iraq illustrates

A) the critical involvement of the cabinet in security matters.
B) the divisive nature of collective responsibility central to cabinet involvement in the decision-making process.
C) the role of the cabinet has declined in the decision-making process in recent years.
D) how a strong cabinet can overrule the prime minister.
E) the importance of the monarchy to the decision-making process.