The correct answer are:
A) the persecution of minority groups
After the expansion of the nationalist ideology in 19th century Russia, there were major persecutions of minority groups that weren't considered fully Russian but who were living in the Russian imperial territory. Examples of this intolerance towards minorities were the pogroms, multitudinous, spontaneous, and premeditated lynchings against ethnic and religious minorities. In the 19th century Russia there were many pogroms against Jewish communities.
C) the promotion of traditional Russian culture
Russian nationalism during the period of the Russian Empire was impulsed by the Tsar who used as a political tool to unite the Russian people and give unity to the empire. It promoted the Russian language, traditions, and customs. This nationalist political ideology was very strong within the empire and it was characterized as pan-Slavism towards foreign territories, as the basis of the Russian expansionism.
