Answer:
B). Bed sheets should be washed at least once a week to prevent an unhealthy buildup of bacteria.
Step-by-step explanation:
As per the question, option B displays the best way to rewrite the given sentence as it is both grammatically and syntactically appropriate. It follows the grammatical structure as the clause 'to prevent an unhealthy buildup of bacteria' is justly mentioned at the end of the sentence to reflect the purpose. Therefore, the purpose of 'suggesting the washing of bed sheets once a week' is clearly demonstrated by the phrase 'to prevent an unhealthy build up of bacteria'. Thus, option B is the correct answer.