Select all the second order, linear, differential equations in the variable $y(t).$

A$.y^{\text{'}\text{'}}+y^{\text{'}}+5y^2=e^t$

B$.y^{\text{'}}+2y=t^3$

C$.y^{\text{'}\text{'}}+4y=0$

D$.y^{\text{'}\text{'}}+5t^2{y}^{\text{'}}+ln|t|y=0$

E$.y^{\text{'}\text{'}}+4y^{\text{'}}+2y=cos(t)$

F$.y^{\text{'}\text{'}}-2y^{\text{'}}+cos(y)=0$

G$.$ None of the Above

Note: Select all that applies.