One of the concerns that surrounded the use of agent orange was that it a. contained very small amounts of dioxin b. was not effective because it evaporated rapidly c. was a major cause of night blindness d. was transported home on the clothing of military personnel e. all of the above

Answer is a. Contained very small amounts of dioxin.
Agent Orange contained amounts of a type of dioxin called TCDD which is highly persistent chemical that lasts in environment for many years. Studies have proven that dioxin is highly toxic and known to be a cancer-causing agent. Short-term exposure to it can cause skin darkening, liver problems and skin disease called chloracne. Also it was linked to type 2 diabetes, nerve disorders, and heart disease.