A. The asset freeze is being imposed on four Sudanese.
B. The conflict in Darfur threatens the national security and foreign policy of the United States.
C. Rallies are planned in Washington and throughout the US to protest the four-year war in Darfur.
D. George Clooney just returned from a trip to the Darfur region.

A. because weight is a fixed quality in an object.
B. because they are far away from the centre of the earth.
C. because of the earth’s strong attraction for them.
D. because they are not taken away from the surface of the earth.