The correct answer is that the refugees were forced into camps. Many of them were founded in 1948/49 and were stationed in the Gaza Strip (Al-Shati, Bureij, Jabalia Camp...), the West Bank (F'ara, Jalazone, Dhelsheh...), Syria (Sbeineh, Neirab, Homs...), Lebanon (Bourj el-Barajneh, Ain al-Hilweh, El-Buss...) and Jordan (Zarqa).