D.narrative
hope this helps if it does remember to give me a like , good luck!
A. the rise of the middle-class and the wide availability of affordable automobiles led to the development of suburban areas
I believe the answer is c also
The answer to the question above is true that the word 'competent' is used correctly in the "it is important to use competent sources when researching" sentence<span>. The word "competent" means a characteristic of acceptable and satisfactory. The sentence above means that it is important to use acceptable sources for a research.</span>