-In an Indexed Sequential File _____

$\begin{array}{lllll}\begin{array}{lll}\text { Course } \quad\quad \text { Record }\\\text { Name } \quad \quad \text { Address }\\\begin{array}{|l|l|}\hline \text { Anatomy } & 2 \\\hline \text { Biology I } & 1 \\\hline \text { Calculus I } & 4 \\\hline \text { Shakespeare } & 3 \\\hline \text { Statistics II } & 5 \\\hline\end{array}\\\text { Index }\end{array}&\begin{array}{lllll}\text { Record }&\text { Course\quad\quad\quad Course\quad\quad\quad\quad Number of\quad Professor }\\\text { Number }&\text { Number\quad\quad\quad Name\quad\quad\quad\quad Credits\quad\quad in Charge }\\\begin{array}{lr}1\\2\\3\\4\\5\end{array}&\begin{array}{|l|l|l|l|}\hline \text { BIOL1001 } & \text { Biology I } & 4 \quad\quad\quad& \text { Smith } \\\hline \text { BIOL3020 } & \text { Anatomy } & 3 & \text { Jones } \\\hline \text { ENGL2540 } & \text { Shakespeare } & 3 & \text { Duncan } \\\hline \text { MATH2000 } & \text { Calculus I } & 4 & \text { Stevens } \\\hline \text { MATH3500 } & \text { Statistics II } & 3 & \text { Jones } \\\hline\end{array}\\\end{array}\end{array}$
-In an indexed sequential file _____.

A) only one field may be indexed
B) the field on which the file is sequenced must be indexed
C) a field other than the one on which the file is sequenced must be indexed
D) it is possible that there is no index
E) the record addresses in the index must be sorted