The main purpose of the wagner labor relations act of 1935 was to:
(a) end the sit-down strike in flint, michigan.
(b) settle the struggle between the afl and the cio.
(c) ensure workers' right to organize and bargain collectively.
(d) guarantee workers a minimum wage.
(e) exempt organized labor from the sherman antitrust act.

The answer is (C) ensure workers' right to organize and bargain collectively. It assured rights for private employees to form unions as well as negotiate collectively for better conditions as well protect their right to go on strike if need be.

c) was interpreted by the supreme court in gibbons v. ogden.

i hope it is the answer and it will you..