Around 130 flights were cancelled during a strike held on 19 January, and others were cancelled in the days that followed. When the flight assistants announced a further 24-hour for 23 January, the Italian Guarantee Authority (Commissione di Garanzia) which regulates strikes in essential public services (under the terms of laws no. 194/1990 and no. 83/2000) (IT0004266F) accused the unions of breaching the legal provision that 10 days must elapse between one strike and the next.

Based on that paragraph can we conclude that this sentence is true?
Flight assistants were part of the striking workforce.

OPTIONS:
[A]. Yes
[B]. It's impossible to say
[C]. No