Filling up a part of the empty hold of a ship with ballasts will

Question

 Consider the following statements:

Filling up a part of the empty hold of a ship with ballasts will              

1. Reduce the metacentric height
2. Lower the position of the centre of gravity
3. Elevate the position of centre of gravity
4. Elevate the position of centre of buoyancy

Which of these statements are correct?

(a) 1, 3 and 4               (b) 1 and 2      

(c) 3 and 4                   (d) 2 and 4