【德德】評論
Many visitors want ☆☆ ☆☆☆ ☆☆☆ ...
Many visitors want to see its castles. One of them is Blarney Castle. castles為可數複數名詞名詞，意即 Blarney Castle為眾多castles的其中一個。(one of "them")。故為B 。