During the Red Scare the federal government rounded up and jailed thousands of
aliens suspected of being Communists
women fighting for suffrage
Ohio State fans on the day of the Michigan game
Chinese immigrants

Correct answer is Chinese immigrants .

Explanation:

First option is a complete nonsense as of course there is no scientific proof that aliens exist.

Second option is not correct as suffrage movement was not a problem for federal authorities, especially in this period.

Third option is also not correct, as this event had nothing to do with Red Scare.

Last option is correct as after the establishment of People's Republic of China, people from China, especially students who came to US in that period.

b) a state law could be declared illegal if it contradicted the constitution.

explanation:

the conflict of this case originated when james w. mcculloch, a cashier of the baltimore branch of the second bank of the united states that the congress had chartered in 1816, refused to pay a tax imposed by the maryland state.

in the case, the state of maryland appealed that the establishment of a second bank was unconstitutional since the constitution didn't say anything about granting that power to congress. however, the case determined that even if such right wasn't specifically stated in the constitution, it was part of the "implied powers" of the government enunciated in article i, section 8.

the case also eliminated maryland's legislation to impose taxes to a national bank, asserting that even though the states retained the power of taxation, the constitution's laws are supreme and can not be controlled by the states, therefore, if a state law contradicts the constitution, it should be declared illegal.

explanation: