How did the Supreme Court ruling of National Labor Relations Board $($NLRB$)$ vs$.$ Jones and Laughlin Steel promote federalism?

Question $1$ options:

a$)$

It banned gun possession in school zones because the regulation did not substantively affect interstate commerce.

b$)$

It gave federal government the authority to regulate manufacturing activities and labor$-$management relations under the commerce clause.

c$)$

It chartered the Interstate Commerce Commission, citing the provision of the elastic clause.

d$)$

It ruled that the federal government did not possess the authority to charter a national bank.