Express the Sum Using Summation Notation $$a + 1 + \frac { a + 2 } { 2 } + \ldots + \frac { a + 5 } { 5 }$$

Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation.
- $$a + 1 + \frac { a + 2 } { 2 } + \ldots + \frac { a + 5 } { 5 }$$

A) $\sum _ { i = 0 } ^ { n } \frac { a + i } { i }$
B) $\sum _ { i = 0 } ^ { 5 } \frac { a + i } { i }$
C) $\sum _ { i = 1 } ^ { 5 } \frac { a + i } { i }$
D) $\sum _ { i = 1 } ^ { n } \frac { a + i } { i }$