Based on the premise "First of the national rulers to take the title of sei-i tai-shogun ( barbarian-subduing great general ), Minamoto expanded and consolidated his power by confiscating lands from some of the defeated Taira and redistributing them to his samurai vassals.", can we conclude the hypothesis "Minamoto did not give land to all of his samurai vassals, only the most favored." is true (see options)?

Available choices: (a). yes. (b). it is not possible to tell. (c). no.
(b).