For many years, whole or fragmented hominid skulls have been excavated. Some of these skulls date from as early as 6 million years ago. By comparing these skulls with other archeological findings, scientists are able to determine when major accomplishments were successfully achieved. Which of the following statements correctly states the evolutionary progression of hominids?

a. Hominids first developed tools, then language. The brain got smaller.

b. Hominids first developed tools, then language. The brain increased in size.

c. Hominids first developed language, then tools. Brain size decreased.

d. Hominids first developed language, then tools for farming. The size of the brain increased.