In Which Case Did the Court Decide That,while Performance of an Existing

Multiple Choice

In which case did the court decide that,while performance of an existing legal duty by police officers was not good consideration for a mine owner's promise to pay,performance beyond what they were legally required to do was good consideration?

A) Anderson v Glass [1869] 5 WW&AB(L) 152.
B) Glasbrook Bros Ltd v Glamorgan County Council [1925] AC 270.
C) Stilk v Myrick [1809] 2 Camp 317.
D) Hartley v Ponsonby (1871) 119 ER 1471.