A) 80 points

B) 10 points

C) 12 points

D) 72 points

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Since A can give B 20 points and C 28 points, the minimum number of points C has is 28. And if B can give C points, the maximum number of points B has is 28+10=38 So A has 20+38=58 points

The correct answer is option

B) 10 pointsIf

A can give B 20 pointsandC 28 points, thenB has 20 pointsleft after givingA 20 points.And if B can give C the same amount of points that C gave to B, then B can give C10 points.Bhas 20 points –20 points(what B gave to A) = 0 remaining pointsCgaveB28 points –10 points(what B gave back to C) = 18 points remainingExplanationA) 80 points:This answer isincorrectbecause it is not possible for B to give C 80 points. If A can give B 20 points and C 28 points, B would have no points left to give C after giving A 20 points.B) 10 points:This answer iscorrectbecause if A can give B 20 points and C 28 points, then B can give C 10 points. B has 20 points – 20 points (what B gave to A) = 0 remaining points, C gave B 28 points – 10 points (what B gave back to C) = 18 points remainingC) 12 points:This answer isincorrectbecause if A can give B 20 points and C 28 points, then B can give C 10 points. B has 20 points – 20 points (what B gave to A) = 0 remaining points, C gave B 28 points – 10 points (what B gave back to C) = 18 points remainingD) 72 points:This answer isincorrectbecause it is not possible for B to give C 72 points. If A can give B 20 points and C 28 points, B would have no points left to give C after giving A 20 points.