In the Case of Donoghue V Stevenson [1932] AC 562,why

In the case of Donoghue v Stevenson [1932] AC 562,why did Donoghue sue Stevenson in negligence and not contract?

A) The contract between Stevenson and Donoghue expressly excluded liability.
B) There was no contract between Donoghue and Stevenson.
C) The law of contract cannot be used to recover compensation for personal injury.
D) The contract was between Donoghue and the retailer.