Why Did Conservatives Gain New Hope in 1990 That the Nation

Why did conservatives gain new hope in 1990 that the nation would turn further to the right?

A) Liberal pro-immigration laws in California were turning public opinion to the right.
B) The nomination of David Souter to replace William Brennan might switch the court to the right.
C) The murder of a member of the Bush family was likely to result in tougher law and order measures.
D) The fall of the Soviet Union allowed the U.S. to openly embrace and support foreign dictators.