What are the reasons for seeking treatment for depression?

I- It is treatable.
II- Treatment reduces the pain and suffering of depression.
III- Treatment is not necessary because depression can be overcome with willpower.
IV- The longer the treatment is delayed, the more difficult it will be to treat.
V- Seeking treatment quickly can prevent depression from becoming more severe and recurring.
a) I, II and IV are correct.
b) II, III and V are correct.
c) I, IV and V are correct.
d) II, IV and V are correct.
e) I, II, III, IV and V are correct.