Given that we want to accumulate the total sum of a list of numbers, which of the following accumulator patterns would be appropriate?

I.

nums = [4, 5, 2, 93, 3, 5]

s = 0

for n in nums:

s = s + 1

II.

nums = [4, 5, 2, 93, 3, 5]

s = 0

for n in nums:

s = n + n

III.

nums = [4, 5, 2, 93, 3, 5]

s = 0

for n in nums:

s = s + n