Which compound would be expected to show intense IR absorption at 1715 cm^-1?

Name: Which compound would be expected to show intense IR absorption at 1715 cm -1 ?
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Question

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The intense IR absorption at 1715 cm^-1 corresponds to the carbonyl stretching vibration of a C=O bond. Compound A has three carbonyl groups, making it the most likely to show an intense absorption at 1715 cm^-1. The other compounds do not contain a carbonyl group and would not show significant absorption at this wavelength.

Which Compound Would Be Expected to Show Intense IR Absorption