What distinguishes a launch window from a launch window constraint?

• A. The launch window is the time interval when conditions permit a safe launch; constraints are conditions that limit this window
• B. The launch window is the period before fueling; constraints are the required preflight checks
• C. The launch window is the orbital pass; constraints are payload integration readiness
• D. The launch window is the date of launch; constraints are weather events only

Answer: (A)