A、The child refugees may be sold by traders. B、The children from Syria may become refugees. C、Two many child refugees may cause

A group of British members of parliament is urging the government to accept 3000 child refugees who have come to Europe from Syria unaccompanied. The International Development Committee says it is concerned that vulnerable children living alone may be caught by people traders.
    The MPs broadly support the government’s strategy of offering to resettle 20,000 of the most vulnerable refugees from countries such as Jordan, Turkey and Lebanon, as well as sending extra aid to the region. But they are worried that not enough is being done to help children who have already arrived in Europe, many of them unaccompanied by adults. The MPs point out that the Italian authorities believe 4000 of these Syrian children simply disappeared last year.
3 What is the International Development Committee worried about?
4 Where are the most vulnerable refugees from?