To generate the jth column of the flexibility matrix

A

A unit force is applied at co-ordinate j and displacements are calculated at all co-ordinates

B

A unit displacement is applied at co-ordinate j and the forces are calculated at all co-ordinates

C

A unit force is applied at co-ordinate j and the forces are calculated at all co-ordinates

D

A unit displacement is applied at co-ordinate j and the displacements are calculated at all co-ordinates