A recent spate of news reports questioning the long-term health benefits of high-fat dietshave done little to convince its practitioners that they should follow more traditional weight-loss plans .
A.have done little to convince its practitioners that they should follow more traditional weight-loss plans (A recent spate singular)
B.have done little to convince their practitioners to follow more traditional weight-loss plans (same as A)
C. has done little to convinceits practitioners to follow
...
A.have done little to convince its practitioners that they should follow more traditional weight-loss plans (A recent spate singular)
B.have done little to convince their practitioners to follow more traditional weight-loss plans (same as A)
C. has done little to convinceits practitioners to follow
...
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