In the context of an LBO transaction, consider the case of WSP Manufacturing, a company targeted for acquisition. WSP has recently invested in new machinery to increase its production capacity and regularly spends on updating its existing equipment to ensure operational efficiency. How do these actions illustrate the difference between maintenance capital expenditures $($CapEx$)$ and growth CapEx?

a$,$ Maintenance CapEx and growth CapEx are essentially the same, as both types of expenditures aim to increase the company's profitability.

b$,$ Maintenance CapEx refers to the investments in new machinery to increase production capacity, while growth CapEx is spent on updating existing equipment.

c$,$ Growth CapEx is the regular expenditure to maintain operational efficiency, and maintenance CapEx is the one$-$off investment to expand production capacity.

d$,$ Growth CapEx refers to the investment in new machinery for increased production capacity, whereas spending on updating existing equipment is an example of maintenance CapEx.