$\text { For the curve } r ( t ) \text {, write the acceleration in the form aTT } + \text { anN. }$

Multiple Choice

$\text { For the curve } r ( t ) \text {, write the acceleration in the form aTT } + \text { anN. }$
-r(t) = (cosh t) i + (sinh t) j + tk

A) $a = ( - \sinh t ) T + N$
B) $\mathbf { a } = ( \sqrt { 2 } \sinh \mathrm { t } ) \mathbf { T } + \mathbf { N }$
C) $\mathbf { a } = ( - \sqrt { 2 } \sinh t ) \mathbf { T } + \mathbf { N }$
D) $\mathbf { a } = ( \sinh \mathrm { t } ) \mathbf { T } + \mathbf { N }$