Can we draw the following hypothesis from the context (see options)? 

Context:

Budapest again became the focus of national political drama in the late 1980s, when Hungary led the reform movement in eastern Europe that broke the communist monopoly on political power and ushered in the possibility of multiparty politics.

Hypothesis: Budapest again became the focus of national political drama after 1970.
Choose your answer from:
[I] Yes
[II] It's impossible to say
[III] No