Hi Pjaseem,
I'm not sure you're correct. Here is how I break down the paragraph, and I'll show where I think the answer (A) becomes logical...
Inertia affects the flow of water pumped through a closed system of pipes.This is the initial statement - the main point if you will
When the pump is first switched on, the water, which has mass, takes time to reach full speed. When the pump is switched off, inertia causes the decrease in the water flow to be gradual. This is simply an explanation
...
I'm not sure you're correct. Here is how I break down the paragraph, and I'll show where I think the answer (A) becomes logical...
Inertia affects the flow of water pumped through a closed system of pipes.This is the initial statement - the main point if you will
When the pump is first switched on, the water, which has mass, takes time to reach full speed. When the pump is switched off, inertia causes the decrease in the water flow to be gradual. This is simply an explanation
...