Answer:
Seven other species are extinct, prehistoric species known from fossils. The giraffe's chief distinguishing characteristics are its extremely long neck and legs, its horn-like ossicones, and its distinctive coat patterns. It is classified under the family Giraffidae, along with its closest extant relative, the okapi.
 
        
             
        
        
        
M phase is the period in the life of the cell when it is conducting cell division
        
                    
             
        
        
        
Noooo not at all that's just bad for the environment
        
             
        
        
        
Answer:
The correct option is A)  It is not written by an authority
Explanation:
In the English language, credibility can be described as the quality of an object to be reliable or trusted. 
A piece of written work which does not mention the name of the writer may be considered to be not reliable and trustworthy. Hence, the correct option is A.
Other options, like option D, is not correct because a peer- reviewed journal carries authentic information as the work has been rechecked by different people who have expertise on the subject.