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                              Q:
                           
                           
                                                      | A) they emit light of a constant intensity | B) their distance from the earth does not change with time | 
| C) they are very far away from the earth resulting in decrease in intensity of light | D) they are nearer to the earth and hence we receive a greater amount of light and therefore minor variations in intensity are not noticeable | 
                              Answer:   A) they emit light of a constant intensity
                              
                                                            
                              
Explanation:
                               
                           
                           Explanation:
 
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