Find $\mathbf { r } ^ { \prime \prime } ( t )$

Find $\mathbf { r } ^ { \prime \prime } ( t )$ for the function given. $\mathbf { r } ( t ) = 4 \mathbf { i } + \sin t \mathbf { j } + \cos t \mathbf { k }$

A) $r ^ { \prime \prime } ( t ) = \sin t j - \cos t \mathrm { k }$
B) $r ^ { \prime \prime } ( t ) = - 4 \sin t \mathrm { j } - \cos t \mathrm { k }$
C) $r ^ { \prime \prime } ( t ) = - 4 \cos t j - \sin t \mathrm { k }$
D) $r ^ { \prime \prime } ( t ) = \cos t j - \sin t \mathrm { k }$
E) $r ^ { \prime \prime } ( t ) = - \sin t \mathrm { j } + 4 \cos t \mathrm { k }$