Which of the following equations defines the tube dilution in a serial dilution?

Which appendix in ICD-9 contains a list of the 3-digit categories for occupational hazards divided into subcategories? 

A. Appendix A B. Appendix B C. Appendix C D. Appendix D E. Appendix E

Needle electrodes are inserted into skeletal muscles to record nerve impulses and measure conduction time when a(n) ________ is performed to detect neuromuscular disorders or nerve damage.  

Fill in the blank(s) with the appropriate word(s).