Which of the following best explain why the lower course of a river is sometimes choked with sediments?1. The valley of a river is widest in its lower course.2. The velocity of a river in its lower course is low. 3. The delta sometimes develops in a river's lower course4. Much of the river water is drawn for irrigation in the lower course.Select the correct answer using the code given below:

Which of the following best explain why the lower course of a river is

1.	Which of the following best explain why the lower course of a river is sometimes choked with sediments?1. The valley of a river is widest in its lower course.2. The velocity of a river in its lower course is low. 3. The delta sometimes develops in a river's lower course4. Much of the river water is drawn for irrigation in the lower course.Select the correct answer using the code given below:
A.	1, 2 and 3 only
B.	1, 3 and 4 only
C.	2 and 4 only
D.	1, 2 and 3 only
Answer» E.