I want to ask question for FCOM 111

In Fitzgerald v Muldoon Mr Fitzgerald sued Mr Muldoon asking the court to declare that Mr Muldoon's press statement declaring that employers no longer needed to make contributions to the compulsory retirement saving scheme was unlawful.

Choose one of the following endings:

(a) The court decided against Mr Muldoon because his political party campaigned against the scheme and had lost the Election

(b) The court decided against Mr Fitzgerald because it is not possible for a citizen to sue the Prime Minister

(c) The court decided in favour of Mr Fitzgerald because Mr Muldoon was trying to repeal an Act of Parliament which only Parliament can do

(d) The court decided in favour of Mr Muldoon because his political party had campaigned against the scheme and won the Election

Please also explain why do we choose it.