If the staff reading at point A = ha and at a point B = hb. The correct staff reading should have been Ha and Hb, where Ha = ha – ha’ and Hb = hb – hb’ then the correction difference in elevation between A and B is given by ____________

If the staff reading at point A = ha and at a point B = hb. The correc

1.	If the staff reading at point A = ha and at a point B = hb. The correct staff reading should have been Ha and Hb, where Ha = ha – ha’ and Hb = hb – hb’ then the correction difference in elevation between A and B is given by ____________
A.	ha – hb – ha’ + hb’
B.	ha + hb + ha’ + hb’
C.	Ha – Hb + ha’ – hb’
D.	Ha + Hb
Answer» B.