I would think its A. the rest of the options are for people that can stand still and focus.
The concept was that DNA is what causes bacterial transformation. Before, people thought the genetic material of bacteria was carried through proteins.
Answer & Explanation:
A work zone is an area of a trafficway with highway construction, maintenance, or utility-work activities. A work zone is typically marked by signs, channeling devices, barriers, pavement markings, and/or work vehicles.