Write the next sentence in this paragraph:

How to choose an under the sink water filter
Make sure you have room under your sink for a filter.
The filter will attach to the pipes beneath the sink, so clear enough space to accommodate the filter system.
Understand your water composition.

pick from the following.
[a]. In most kitchens, water consumption is between 6 and 13 cups. Sinks have nitrates hydrogenated in the water, so it is considered a conservation deficiency if your appliance may not come with an under the sink water filter.
[b]. Different filters function and interact differently than regular water. Sometimes they actually water much differently than ordinary garden water.
[c]. Before you choose a filter, you will need to know what kind of impurities are present in your natural water supply. Buy a do-it-yourself water testing kit to determine what you want to filter out of your water.
[d]. Water composition on a set of toilets, sinks, and faucets can add up to a huge difference. Be sure to make a lot of extra room-add panels or outlets where necessary, or something like a rail that closes a toilet, ceiling panel, or tub.
[c].