Splitting into three, splitting into four.

gistfile1.rb

# Let's say you have a collection of seven items:

  ['a', 'b', 'c', 'd', 'e', 'f', 'g']

# and you want to split it into three groups. What should the result be?

A.
  [
    ['a', 'b', 'c'],
    ['d', 'e'],
    ['f', 'g']
  ]

# or

B.
  [
    ['a', 'b', 'c'],
    ['d', 'e', 'f'],
    ['g']
  ]
  
# Likewise, when splitting a collection of 10 items into four groups, should the result be:

C.
  [
    ['a', 'b', 'c'],
    ['d', 'e', 'f'],
    ['g', 'h'],
    ['i', 'j']
  ]
  
# or

D.
  [
    ['a', 'b', 'c'],
    ['d', 'e', 'f'],
    ['g', 'h', 'i'],
    ['j']
  ]
  
# I realize there is an aspect of "it depends on what you're doing" here, but give me your "general-case" gut feeling.