Answer: Option D, (40 minutes) is the correct answer.
Step-by-step explanation: Time she has to complete 3 assignments = 2 hours.
Let the time taken to complete each assignment be 'x'
→ 2 hours = 120min
∴ The amount spend for each assignment is the same.
∴ Time taken for each assignment = 120/3 = 40min
∴ It takes 40 min to complete each assignment, Option D.