FInd the Tangential and Normal Components of the Acceleration $\pi$ /2 < T

Multiple Choice

FInd the tangential and normal components of the acceleration.
-r(t) = (t + 6) i + (ln(sec t) - 1) j + 7k, - $\pi$ /2 < t < $\pi$ /2

A) a = (sec t tan t) T + (sec t) N
B) a = (csc t) T + (sec t) N
C) a = ( t) T + (cos t) N
D) a = (cos t) T + (cos t) N