Find the Exact Value of the Arc Length of the Function

Multiple Choice

Find the exact value of the arc length of the function $f ( x ) = 3 - x$ on the interval [1, 4] using a definite integral.

A) $4 \sqrt { 2 }$
B) $3 \sqrt { 2 }$
C) $5 \sqrt { 2 }$
D) $4 \sqrt { 3 }$