3、Given $f(x)=x^{2}-2 x+3, g(x)=k x-1$, then “ $|k| \leq 2$ ” is “ $f(x) \geq g(x)$ holds for all $x \in R$ ” ( )
A、Sufficient but not necessary condition
B、Necessary but not sufficient condition
C、Sufficient and necessary condition
D、Neither sufficient nor necessary condition
3、A

 

The translation retains the original text's line breaks and formatting.