Using the First Step in Hypothesis Testing, How Would One $H_{o}: \bar{X}=\mu$

Using the first step in hypothesis testing, how would one represent the following statement from a researcher, "I hypothesize that my sample mean is different from the population mean"?

A) $H_{o}: \bar{X}=\mu$
$H_{1}: \bar{X} \neq \mu$
B) $H_{o}: \bar{X}=\mu$
$H_{1}: \bar{X}>\mu$
C) $H_{o}: \bar{X}=\mu$
$H_{1}: \bar{X}<\mu$
D) $H_{o}: \bar{X}=\mu$
$H_{1}: \bar{X} \geq \mu$