✔ 最佳答案
The above 2nd person is correct.
당신을 그리워합니다 means 掛念你/ 想念你
Please choose the 2nd answer as it is the first correct answer given.
Just want to say these:
당신을 보고 싶다 means want to see you / 想見你 -> and that implies 掛念你/ 想念你
당신을 궁금합니다 direct translated meaning is curious about you -> not 思念你
그리워하다 is used quite often in conversation. At least l always use it if it matches the meaning that l want to express e.g. when l'm talking about things in the past ... 想當年....
보고 싶다 and 그리워하다 are used in different context. Just think about 보고 싶다 means "想見..." and 그리워하다 means "思念..." , you wont mix up the 2 words.