Which of the following statements about estuaries are true?
I. They are the gateway to freshwater breeding grounds of some marine animals II. They are the breeding grounds for many types of aquatic animals III. Estuaries are resistant to pollution because the constant inflow of freshwater flushes the pollutants out into the ocean. IV. They are areas where freshwater streams or rivers merge with the sea
A - All are true
B - I, II, and IV
C - II, III, and IV
D - III and IV
E - I, II, and III
F - None are true
Answer: B - I, II, and IV