In lochner v. new york (1905), the supreme court ruled that:

a. the doctrine of separate but equal was constitutional.

b. state regulation of labor practices violated firms' property rights.

c. the fourth amendment did not apply to interstate commerce.

d. factory practices could only be regulated by the states.

e. factory practices could only be regulated by the federal government.

B.  State regulation of labour practises violated firms property right.

Explanation:

Lochner vs. New York was an important labour law case. In this case the Supreme Court ruled that the New York law that set  ten hour limit on the working hours of bakers was unconstitutional.

Five judges rules in the favour while four were dissented. The decision was written by Justice Rufus Peckham, he declared the act to be unconstitutional and ordered conviction of Lochner to be reversed.

The court considered the New York law to be violating fourteenth amendment. Lochner was owner of a bakery. He was charged with vilolating the Bakeshop Act in 1899 as he compelled them to work for more than sixty hours per week. He had to fine 25 dollars for this. He was again convicted in 1901 but challenged his conviction in supreme court

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