Fossil evidence shows that giraffes living 1000 years ago had much shorter necks than the giraffes ...

Fossil evidence shows that giraffes living 1000 years ago had much shorter necks than the giraffes seen today. Which
  statement best explains this observation?
  a. The two groups of giraffes are not related.
  b. The two groups of giraffes arose as a result of convergent evolution.
  c. The difference in neck length is evidence for homoplastic inheritance.
  d. The two groups of giraffes were located in different geographical locations.
  e. The giraffes acquired longer necks through the continuing process of natural selection.

Question 2

What process has been used to produce many of todays vegetables, such as broccoli, kohlrabi and cauliflower, which
  are all derived from wild cabbage?
  a. mutation
  b. natural selection
  c. artificial selection
  d. convergent evolution
  e. comparative anatomy