In a Parliamentary System with Three or More Parties, When

In a parliamentary system with three or more parties, when a party does not obtain a majority vote, what must happen for a government to be formed?

A) Parties must negotiate and compromise.
B) Party leaders decide they would rather participate in a coalition than be in the opposition.
C) A vote of no confidence in the new coalition government will cause a new election to be called.
D) All of the above