-The Most Common Data Indexing System in Use Today Is

$\begin{array}{lllll}\begin{array}{lll}\text { Course } \quad\quad \text { Record }\\\text { Name } \quad \quad \text { Address }\\\begin{array}{|l|l|}\hline \text { Anatomy } & 2 \\\hline \text { Biology I } & 1 \\\hline \text { Calculus I } & 4 \\\hline \text { Shakespeare } & 3 \\\hline \text { Statistics II } & 5 \\\hline\end{array}\\\text { Index }\end{array}&\begin{array}{lllll}\text { Record }&\text { Course\quad\quad\quad Course\quad\quad\quad\quad Number of\quad Professor }\\\text { Number }&\text { Number\quad\quad\quad Name\quad\quad\quad\quad Credits\quad\quad in Charge }\\\begin{array}{lr}1\\2\\3\\4\\5\end{array}&\begin{array}{|l|l|l|l|}\hline \text { BIOL1001 } & \text { Biology I } & 4 \quad\quad\quad& \text { Smith } \\\hline \text { BIOL3020 } & \text { Anatomy } & 3 & \text { Jones } \\\hline \text { ENGL2540 } & \text { Shakespeare } & 3 & \text { Duncan } \\\hline \text { MATH2000 } & \text { Calculus I } & 4 & \text { Stevens } \\\hline \text { MATH3500 } & \text { Statistics II } & 3 & \text { Jones } \\\hline\end{array}\\\end{array}\end{array}$
-The most common data indexing system in use today is the _____.

A) simple linear index
B) sequential access index
C) B+-tree index
D) C+-tree index
E) complex linear index