Let $f ( t ) = \frac { 19 } { 3 + 4 e ^ { - t / 10 } }$

Multiple Choice

Let $f ( t ) = \frac { 19 } { 3 + 4 e ^ { - t / 10 } }$ .Which value of t corresponds to a possible inflection point for f (t) ?

A) There is no inflection point.
B) $\frac { 3 } { 4 } \ln ( 110 )$
C) $\ln \left( \frac { 3 } { 4 } \right)$
D) $110 \ln \left( \frac { 4 } { 3 } \right)$