Style flexibility is$$ a$($n$)\_\_\_\_\_\_\_\_\_.$

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Part $1$

A$.$

inborn characteristic that is critical to building partnering relationships

B$.$

sales strategy that can be learned and is crucial to building partnering relationships

C$.$

communication strategy that can be$$ learned, but is not critical to building partnering relationships

D$.$

characteristic that cannot be$$ learned, but is crucial to building partnering relationships

E$.$

$$personal$-$style preference, but not critical to building partnering relationships