In Ireland,（ ）is the guardian of the constitution.
A、the Senate
B、the president
C、the prime minister
D、the Supreme Court
【正确答案】：B
【题目解析】：the president is the guardian of the constitution and may ,in certain circumatances, submit a bill passed by the Oireachtas to the people in a referendum or refer it to the Supreme Court to decide on its constitutionality.