Financial stability is a goal of most central banks. Based on a graph showing the evolution of

Question:

Financial stability is a goal of most central banks. Based on a graph showing the evolution of the European Central Bank’s assets (FRED code: ECBASSETS), how important was this goal for the ECB
(a) Before 2007,
(b) During the crisis period of 2007-2009,
(c) When the euro-area crisis intensified in 2011-2012?