Flagrant means (of an action considered wrong or immoral) conspicuously or obviously offensive.
Ex: a flagrant violation of the law
Blatant means (of bad behaviour) done openly and unashamedly.
Ex: blatant lies
Palpable meansable to be touched or felt.
Ex: the palpable bump at the bridge of the nose
Scandal means an action or event regarded as morally or legally wrong and causing general public outrage.
Ex: a bribery scandal involving one of his key supporters
Felony means a crime regarded in the US and many other judicial systems as more serious than a misdemeanour.
Ex: he pleaded guilty to six felonies
Thus option (A) is the correct choice.