it's hArD to ConFirm or rEFutE thAt thErE's A CAusAl rElAtionship BEtwEEn thE Amount oF FAt wE EAt AnD thE ______ oF hEArt AttACks.
[A] inCiDEnCE
[B] impEtus
[C] momEntum
[D] EmErgEnCE