A bond manager who is responsible for immunizing a financial liability with financial assets is most likely engaging in

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A bond manager who is responsible for immunizing a financial
liability with financial assets is most likely engaging in which of
the investment strategies below?
Group of answer choices
Buying a fixed income asset with the same duration as the
financial liability's duration
Buying those risk-free assets with the lowest yield
Buying a non-financial asset with the same duration as the
financial liability
Swapping the financial liability for a non-financial
liability