Choose the correct answer

Question 12: The... the city's infrastructure improves, the...traffic congestion will be
A. less/ worse  B. more/better C. more/worse D. less/better
Chestion 13: The...the dust in the air, the... it is to breathe comfortably in the city
A more easier B. less/harder C. more/harder D. less/easier
Question 14: The... the local businesses are supported, the ...they will contribute to the city's
A.less/more B. more/less C. more/more D. less/less
Question 15: ...smoother ... traffic flow in the downtown area. .. better the comi for workers.
A. The/the/the B.A/the/a C. The/a/a D. The/a/the