An architect's drawings contain a calculation error that forces a client to rebuild a foundation. The client's purely financial loss is best insured by:

解析

Professional liability, also written as errors and omissions, covers economic loss caused by a failure to use the skill and care expected of a professional, which a faulty design calculation is. A general liability policy responds to bodily injury and property damage from an occurrence and excludes damages arising out of rendering professional services. Employment practices liability answers claims brought by employees, and a surety bond guarantees performance to a third party rather than insuring the architect's mistake.