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A graft of tissue, such as skin, from a different person is usually rejected by the body.

Which statement about graft rejection is correct? 

1 ) 

The graft is rejected by T-lymphocytes because they circulate in the blood and can gather at the graft site.  

2 ) 

The graft is rejected by B-lymphocytes because they make and release antibodies which react with the surface antigens on the graft cells. 

3 ) 

The graft is rejected by B-lymphocytes because T-lymphocytes are not stimulated to produce antibodies.  

4 ) 

The graft is rejected by T-lymphocytes because the graft tissue causes T-lymphocytes to release antibodies. 

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