Given the Following Master File Containing Employee Names (Key Field)and

Multiple Choice

Given the following master file containing employee names (key field) and hourly rates,which of the following transactions would cause an error message to occur?
$$\begin{array}{l}\text { Master File }\\\begin{array} { l l } \text { John } & 20.00 \\\text { Mary } & 10.00 \\\text { Sue } & 6.00 \\\text { Tom } & 8.00 \\\text { Vince } & 13.00\end{array}\end{array}$$

A) Add     Mary      20.00
B) Delete     Mary
C) Delete     Sue
D) Change     Tom     8.00