$A$ plants have a higher temperature optimum than the plants adapted to $B$ climate. Here $A$ and $B$ refer to:

  • A
    $A-Desert; B-Tropical$
  • B
    $A-Temperate; B-Tropical$
  • C
    $A-Tropical; B-Temperate$
  • D
    $A-Desert; B-Temperate$

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