The supreme court declared the national industrial recovery act unconstitutional partly because it
a) used an overly broad definition of interstate commerce.
b) waived antitrust laws for cooperating businesses.
c) granted public money to private corporations.
d) applied only to corporations, not partnerships and sole proprietors.
e) allowed for child labor.

The correct answer is letter D) applied only to corporations, not partnerships and sole proprietors. The Supreme Court declared the National Industrial Recovery Act unconstitutional partly because it is applied only to corporations, not partnerships and sole proprietors. The law was passed by the US Congress in response to regulate industry in attempting to raise prices.