Adoptions College Instructors Who Adopt This Book Are (We Hope!) $\frac { 59 } { 144 }$

Adoptions College instructors who adopt this book are (we hope!) three times as likely to continue to use the book the following semester as they are to drop it, whereas nonusers are eight times as likely to remain nonusers the following year as they are to adopt this book. Determine the probability that a nonuser will be a user in two years. In the long term, what proportion of college instructors will be users of this book

A) The probability that a nonuser will be a user in two years is $\frac { 59 } { 144 }$ . Proportion of college instructors is $\frac { 9 } { 13 }$ .
B) The probability that a nonuser will be a user in two years is $\frac { 59 } { 324 }$ .
Proportion of college instructors is $\frac { 4 } { 13 }$ .
C) The probability that a nonuser will be a user in two years is $\frac { 59 } { 144 }$ .
Proportion of college instructors is $\frac { 4 } { 13 }$ .
D) The probability that a nonuser will be a user in two years is $\frac { 59 } { 324 }$ .
Proportion of college instructors is $\frac { 9 } { 13 }$ .
E) The probability that a nonuser will be a user in two years is $\frac { 2 } { 9 }$ .
Proportion of college instructors is $\frac { 1 } { 9 }$ .