Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A:The increased emission of \(CO_2\) and \(CH_4\) from boreal and tundra soils in response to elevated \(CO_2\) and temperature will have positive feedback effects on climate change.
Reason R: Spring phenology in boreal ecosystems does not respond to climate change trends.
In the light of above statements, choose the correct answer from the options given below
Consider the following statements:
(A) Availability is generally conserved.
(B) Availability can neither be negative nor positive.
(C) Availability is the maximum theoretical work obtainable.
(D) Availability can be destroyed in irreversibility's.