Solve the Problem $D$ Be the Region Bounded Below by The $x y$

Multiple Choice

Solve the problem.
-Let $D$ be the region bounded below by the $x y$ -plane, above by the sphere $x ^ { 2 } + y ^ { 2 } + z ^ { 2 } = 49$ , and on the sides by the cylinder $x ^ { 2 } + y ^ { 2 } = 36$ . Set up the triple integral in cylindrical coordinates that gives the volume of $D$ using the order of integration $\mathrm { dz } \mathrm { dr } \mathrm { d } \theta$ .

A) $\int _ { 0 } ^ { 2 \pi } \int _ { 0 } ^ { 7 } \int _ { 0 } ^ { \sqrt { 36 - z ^ { 2 } } } r d z d r d \theta$
B) $\int _ { 0 } ^ { 2 \pi } \int _ { 0 } ^ { 6 } \int _ { 0 } ^ { \sqrt { 49 - z ^ { 2 } } } r d z d r d \theta$
C) $\int _ { 0 } ^ { 2 \pi } \int _ { 0 } ^ { 7 } \int _ { 0 } ^ { \sqrt { 36 - r ^ { 2 } } } r d z d r d \theta$
D) $\int _ { 0 } ^ { 2 \pi } \int _ { 0 } ^ { 6 } \int _ { 0 } ^ { \sqrt { 49 - r ^ { 2 } } } r d z d r d \theta$