Answer:
Answer is Option B: Yes, if Becker & Smith also performed a review engagement for Troper.
Explanation:
Contingent fee is a fee provided for a service if that service has produced a favourable result.
A "contingency fee arrangement" gives entry to the courts for those people who cannot pay the fees for lawyer or advocates and costs of civil court cases. A review engagement is an audit with only difference that auditor would check that there are no apparent issues on how things are reported or managed.
If Becker and Smith are performing the review and they are also managing Troper's accounts, it will raise ethical concern.