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Problem- Although the atmosphere contains 78% nitrogen, most plants cannot use it as a source of nitrogen for growth because:
A. The breaking of the nitrogen molecules into nitrogen atoms is an exothermic process.
B. The triple bond in the nitrogen molecule is difficult to break.
C. Oxygen interferes with the absorption of nitrogen.
D. Plants cannot absorb gases.
Provide me complete explanations of above question so I can get high score
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