C is correct!
(A) Thegrowing demand for cheaper houses, unpolluted environs and tension- free lifestyle, along with the inability to pay the high rentals in down–townhave turned --> S/V agreement error
(B)Thegrowing demand for cheaper houses, unpolluted environs and tension- free lifestyle and for the inability to pay the high rentals in down–townhave turned --> S/V agreement error
(C) Thegrowing demand for cheaper houses, unpolluted environs, tension- free lifestyle together
...
(A) Thegrowing demand for cheaper houses, unpolluted environs and tension- free lifestyle, along with the inability to pay the high rentals in down–townhave turned --> S/V agreement error
(B)Thegrowing demand for cheaper houses, unpolluted environs and tension- free lifestyle and for the inability to pay the high rentals in down–townhave turned --> S/V agreement error
(C) Thegrowing demand for cheaper houses, unpolluted environs, tension- free lifestyle together
...
