By waging the gallipoli campaign, the allies hoped to:
a)reinforce albanian and serbian borders
b)protect shipping routes to russia
c)seize control of colonies in australia
d)block german troops from greece

By waging Gallipoli campaign, the allies hoped to : B. Protect shipping routes to Russia

Back then, Russia was still an ally of the British and United states. By securing this shipping routes, it will open the path for the allied forces to take down ottoman

hope this helps