2. In the expansion of $\left(x^{2}+3 x+2\right)^{5}$, the coefficient of the $x$ term is ( ).
(A) 160
(B) 240
(C) 360
(D) 800
2.B.

In the expansion of $\left(x^{2}+3 x+2\right)^{5}$, to obtain the term containing $x$, 4 factors take 2, and one factor takes the $3 x$ term, so the coefficient of $x$ is $\mathrm{C}_{5}^{4} \times 3 \times 2^{4}=240$.