What Were the Main Justifications Provided by the ECJ in Joined

What were the main justifications provided by the ECJ in Joined Cases C-6/90 and C-9/90 Francovich for the establishment of the principle of State liability?

A) The necessity to ensure that the Member States meet their obligations deriving from EU law.
B) The necessity to ensure that the Member States implement correctly and timely EU directives aimed at the creation of the internal market bearing in mind that the deadline for the establishment of the internal market was approaching.
C) The peculiarity of the EU legal system, the necessity of ensuring the effectiveness of EU law and the requirements of Article 4(3) TFEU.