Critical Reasoning (CR) | A ten-year comparison between Brazilian and Canadian crops

my 2 cents:
per planted acre - B = 0.68*C
i.e. (all the yield produced in B)/(all the PLANTED AGRICULTURAL land in B) &
(all the yield produced in C)/(all the PLANTED AGRICULTURAL land in C)

whereas

per agricultural acre - B = 1.15*C
i.e. (all the yield produced in B)/(all the PLANTED + UNPLANTED AGRICULTURAL land in B) &
(all the yield produced in C)/(all the PLANTED + UNPLANTED AGRICULTURAL land in C)

Thus what A is saying is that - there is a greater portion of unplanted agricultural
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