Q$3)$ Functional Level strategy can be defined as:

a$)$ An organizational and operational plan to ratify the business and corporate strategy

b$)$ Having a goal of optimizing company operations, profitability and growth

c$)$ Evaluating the merits of continued investment or withdrawal of investments across different business units

$$ d$)$ "How" business should be conducted to achieve a set of long$-$term goals $($Cost leadership, differentiation, etc.$)$

$$ e$)$ None of the above