The correct answer is letter C
Throughout the conflict, the submarine was not able to successfully face military naval units, unlike what happened against merchant ships; simply because on the surface there was generally no more than a piece of reduced caliber and submerged both its speed and the radius of action were small.
Even so, a little by chance, the German submarine U-9, 493/611 tons of displacement, commanded by Weddingen, torpedoed three battleships of the already old Aboukir class, when they patrolled the English Channel in the narrow zone between the coast Dutch and minefields. At 6.30 on 22 September 1914, the Aboukir was hit by a torpedo, the respective commander judging that the ship had hit a mine.
