Indicate Whether Each Business Practice Listed Below Strengthens (S) or Weakens

Indicate whether each business practice listed below strengthens (S) or weakens (W) a company's system of internal control.
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a. Discouraging employees from taking paid vacations
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b. Using banking facilities as much as possible
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c. Having employees bonded
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d. Conducting surprise audits of cash on hand
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e. Having one person open the mail
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_____ f. Having the receiving department compare goods received with goods ordered