In Obtaining Sufficient Appropriate Audit Evidence,the Work of Which Type

Multiple Choice

In obtaining sufficient appropriate audit evidence,the work of which type or types of specialists may be relied upon?  
$\begin{array}{lcc} & \text { Client Engaged } & \text { Auditor Engaged } \\\text { A. } & \text { Yes } & \text { Yes } \\\text { B. } & \text { Yes } & \text { No } \\\text { C. } & \text { No } & \text { Yes } \\\text { D. } & \text { No } & \text { No }\end{array}$

A) Option A
B) Option B
C) Option C
D) Option D