${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_c\text{o}\text{n}\text{s}\text{t}\text{i}\text{t}\text{u}\text{t}\text{e}\text{s}\text{a}business\text{c}\text{a}\text{s}\text{e}\text{f}\text{o}\text{r}\text{c}\text{o}\text{r}\text{p}\text{o}\text{r}\text{a}\text{t}\text{e}\text{c}\text{i}\text{t}\text{i}\text{z}\text{e}\text{n}\text{s}\text{h}\text{i}\text{p}\text{.}}$

Select one:

$a.$

Reducing the carbon footprint $by$ manufacturing cars with lower exhaust emissions

$b.$

Building apartment blocks $to$ restricted heights $to$ maintain the privacy $of$ the surrounding neighborhood residents

$c.$

Increasing salaries $of$ mine workers $in$ response $to$ strike action $at$ the mines

$d.$

Donating solar panels $to$ a community primary school