"Sales" refers to the activities related to selling or the number of goods sold.
"Sails" refers to a tensile structure on a boat used to propel the boat using the wind.
"Saile" is a misspelt word.
"sells" is the activity of giving a product to a person in exchange for money.
Among the options, "Sails" is the obvious choice.
Hence, the answer is option B.
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