The battle between the Merrimack and the Monitor showed that...
a- new technology gave the Union an advantage.
b- surprise attacks were effective.
c- the South had better ships than the North.
d- the North and South were equally matched at sea.

Why was the u.s. annexation of hawaii delayed until william mckinley became president? a: the rebels who overthrew queen liliuokalani opposed u.s. annexation. b: the senate did not approve the treaty of annexation until mckinley entered the white house. c: supporters of the nationalist cause were in the majority in hawaii until 1898. d: mckinley’s predecessor, grover cleveland, refused to sign the treaty of annexation.