Read the following advertisement and mark the letter A, B, C, or D on your answer sheet to indicate the correct option that best fits each of the numbered blanks from 1 to 6.

"Support Green Living in Your Neighborhood!"
Communities worldwide are embracing sustainable practices, especially in (1) _______ and regions where resources are scarce. While modern infrastructure offers many conveniences, it also (2) _______ difficulties for those aiming to keep environmental impacts low. With (3) _______ residents clustered in one area, local systems often fail to meet growing demand, leading to pollution and waste problems.
Currently, many efforts focus on solutions (4) _______ support community-based initiatives, though some regions may lack immediate interest. (5) _______ , residents are more concerned with daily needs than future sustainability. Only by creating supportive policies can these areas (6) _______ for greater environmental goals.