Toolmaking Is Linked with the Development of Human Language Partly

Toolmaking is linked with the development of human language partly because:

A) different parts of the brain appear to be involved.
B) lip/tongue dexterity is required to make tools.
C) the main use of language is to impart technical knowledge.
D) both tool making and communicating involve classifying things as well as at seeing/making connections between them.
E) All the answers are correct.