Question

every aspect of a commercial construction project is handled by this key player. this is a professional who creates requirements and designs for commercial buildings. this professional has knowledge of building and maintaining infrastructure. a. commercial contractor b. commercial architect c. civil engineer

Explanation:

A commercial contractor is mainly involved in the construction - related work execution. A civil engineer creates requirements and designs for buildings and has knowledge of building and maintaining infrastructure. A commercial architect focuses more on the aesthetic and functional design of commercial spaces. The description "creates requirements and designs for commercial buildings" and "has knowledge of building and maintaining infrastructure" best fits a civil engineer.

Answer:

c. civil engineer