A.

For all $x ＞ 0$ , it is true that $x^{2} < 5 x - 4$ .

B.

For all $x ＞ 0$ , it is true that $x^{2} ＞ 5 x - 4$ .

C.

There are constants $c_{1}$ and $c_{2}$ such that if $0 < x < c_{1}$ , then $x^{2} ＞ 5 x - 4$ , but if $c_{1} < x < c_{2}$ , then $x^{2} < 5 x - 4$ , and if $x ＞ c_{2}$ , then $x^{2} ＞ 5 x - 4$ .

D.

There are constants $c_{1}$ and $c_{2}$ such that if $0 < x < c_{1}$ , then $x^{2} < 5 x - 4$ , but if $c_{1} < x < c_{2}$ , then $x^{2} ＞ 5 x - 4$ , and if $x ＞ c_{2}$ , then $x^{2} < 5 x - 4$ .