please solve my question

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Given below are a few activities carried out by agricultural farming.

1. Adding fertilizer or manure to the soil.

2. Removing the husk to feed cattle.

3. Removing weeds from the field

Which of the above helps to increase the amount of nutrients available to the crop plant?

A) Only 1 b) Only1 and 2

c) Only 1 and 3 d) All: 1, 2. And 3