$$\frac { a ^ { 4 } - a ^ { 3 } } { a ^ { 4 } + a ^ { 2 } } \cdot \frac { a ^ { 2 } + 1 } { a ^ { 2 } - a }$$ Which of the following is the simplified form of this expression? A) $a - 1$ B) a C) 1 D) $a + 1$ E) $a ^ { 2 } + 1$
$$\frac { a ^ { 4 } - a ^ { 3 } } { a ^ { 4 } + a ^ { 2 } } \cdot \frac { a ^ { 2 } + 1 } { a ^ { 2 } - a }$$
Which of the following is the simplified form of this expression?\\
A) $a - 1$\\
B) a\\
C) 1\\
D) $a + 1$\\
E) $a ^ { 2 } + 1$