Which of the Following Shows a Broad Absorption at $\mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { CN }$

Which of the following shows a broad absorption at 3200-3500 cm^-1 in its IR spectrum?

A) $\mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { CN }$
B) $\mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm {~N} \left( \mathrm { CH } _ { 3 } \right) _ { 2 }$
C) $\mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { CO } _ { 2 } \mathrm { CH } _ { 3 }$
D) $\mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { CH } _ { 2 } \mathrm { OH }$
E) $\mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { OCH } _ { 3 }$