When there is an improvement in technology holding everything else constant
A) PPF shift inward
B) PPF shift upward
C) PPF remain same
D) PPF shift downward

PPF shifts upward because technology improvement increases the efficiency of the economy which in turn increases potential production and leads the PPF to shift rightward
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PPC shifts upward
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Ppc shifts upwards
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Ppf will shift upwards.
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.welcome
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