The Narmada river in the Peninsular plateau flows westward with a remarkably straight channel. It is because the

• A.  slope gradient in this part controls the river channel pattern
• B.  river carries a huge amount of water which has created a straight channel course
• C.  river forms the boundary between the Central Highlands and the Deccan Plateau
• D.  river flows through the trough of a rift valley inclined westward