I think its d i hope this helps
        
                    
             
        
        
        
Answer:
doing a skill or solving a problem yourself.
Explanation:
 
        
                    
             
        
        
        
Answer: positive
Explanation:
Positive connotations refers to the associations which are affirmative or good and has good feelings. They give positive emotions.
From the information given, the word wonder has a positive connotation. From the sentence "Like many improbable ideas, when it actually works, it's a wonder", wonder here can also mean miracle and this brings positive feelings.
 
        
             
        
        
        
Answer:
A simple subject is a main word.
Explanation:
Its a main word or words that tell whom or what a sentence discusses. 
It also means who or what is "doing" the verb, without any modifiers.