Select from options: Continue writing the next sentence.

How to keep algae out of water fountains
Place your fountain in the shade.
Direct sunlight enables more rapid algae growth. Help minimize algae proliferation by keeping your fountain in a shady or covered area.

Select from the following.
[a]. A good place to place your fountain is under a hooded garage door or on top of a raised platform. Do not place your fountain in direct sunlight, since this will disrupt the biological chemistry of your fountain and cause algae to develop in its water..
[b]. If a completely shaded area is not available, a partially shaded area may still help slow algae growth. Also consider placing a cover such as an umbrella or awning in the area near your fountain to help provide shade if no natural shade is available..
[c]. You should actually water the fountain about two to three times per day, since slow growth can attract water from other fountains. Do not place the fountain under any overhanging structures or near buildings..
[d]. Put your fountain in a well lit location. Muddy and/or wet, it will not be able to drain properly at this point, leading to algae poisoning..
Answer:
[b].