Nineteen of the European Union's 25 member states were voting in the biggest transnational elections ever held, and the first for the EU since the bloc's expansion into the former communist eastern Europe on May 1.

Based on that paragraph can we conclude that this sentence is true?
10 of the European Union's 25 member states were not voting in the biggest transnational elections ever held.

Options: (A). Yes; (B). It's impossible to say; (C). No;
(C).