The british blockade prevented
a) food and raw materials from reaching the central powers.
b)germany’s ships from entering their own ports.
c)germany from collaborating with the central powers countries.
d) ships from leaving german ports to fight the allies.

Hello!

The answer is A) food and raw materials from reaching the Central Powers.

The British Blockade ocurred from 1914 to 1919 during World War I. It was a naval operation, and its main objective was to restrict the maritime supply of food to the Central Powers since most of war material and imports of food were shiped across the Atlantic Ocean.

Hope this helps

yeah man were the map at?