It depends on your teacher, it should be A. It could be B if that’s what your teacher wants but I would go with A.
The right option is; a. It is rich in minerals from volcanic deposits.
Volcanic soil (andisol) is a light and fluffy soil that is formed from volcanic ash and cinder deposits. Volcanic soil is very fertile because it is highly composed of non-crystalline minerals, such as allophane and imogolite from volcanic deposits. These minerals create strong bonds with organic matter which leads to the accumulation of organic matter in the soil. Volcanic soil has high water retention capability and it supports the growth of crops such as rice, maize and fruits.
The human circulatory system processes an average of 20 litres of blood per day through capillary filtration, which removes plasma while leaving the blood cells. Roughly 17 litres of the filtered plasma is reabsorbed directly into the blood vessels, while the remaining three litres remain in the interstitial fluid. One of the main functions of the lymph system is to provide an accessory return route to the blood for the surplus three litres
A divergent boundary is a place where two tectonic plates are pushed apart by the formation of new crust rising up from the mantle. At a divergent boundary you would expect to find:
Rift Valley
Mid-Ocean Ridge
Deap Sea Trench
New Oceanic Crust
The answer is (D), because none of the other answers make sense