Which of the following statements is true?

If $m$ is an integer, the floor of $m+\frac{1}{2}$ is $m.$

For all real numbers $x$ and $y,{|}_{{?}_{?}}x+y_{{?}_{?}}|={|}_{{?}_{?}}{x}_{{?}_{?}}|+{|}_{{?}_{?}}{y}_{{?}_{?}}|.$

${|}_{{?}_{?}}-{1\mathrm{.}8}_{{?}_{?}}|=-1$

$|$~$-1\mathrm{.}8$~$|=-2$

If $m$ is an integer, the ceiling of $m+\frac{1}{2}$ is $m.$