Plss answer kung alam nyo po​

Which punctuation mark would best fill in the blanks in the following sentence in the past year i visited denver, colorado portland oregon and seattle washington

According to the riddle of the rosetta stone, what problem did both jean-francois champollion and sylvestre de sacy face in their attempts to decipher the writings on the rosetta stone?

Which members of the press did nixon say have been the hardest on him? a.the television news agencies. b.newspapers c.tabloids d.public radio !