I. Submarines and mines were an inexpensive and better way to engage battleships II. Convoys proved to be the most effective defense against submarines

III. The British navy dominated the world’s oceans through its use of submarine warfare

IV. Great sea battles between surface ships were rare during the war

Which statements are TRUE about warfare at sea in World War I?

a

I, II, and IV

b

I and III only

c

III and IV

d

I, II, and III