Express the Area of the Region Bounded by the Given $\int _ { 0 } ^ { 8 } \int _ { 8 } ^ { x } d y d x$

Multiple Choice

Express the area of the region bounded by the given line(s) and/or curve(s) as an iterated double integral.
-The coordinate axes and the line x + y = 8

A) $\int _ { 0 } ^ { 8 } \int _ { 8 } ^ { x } d y d x$
B) $\int _ { - 8 } ^ { 8 } \int _ { x } ^ { 8 } d y d x$
C) $\int _ { 0 } ^ { 8 } \int _ { 0 } ^ { 8 - x } d y d x$
D) $\int _ { - 8 } ^ { 8 } \int _ { 0 } ^ { 8 - x } d y d x$