What was the effect of the 16th amendment?

Ait allowed workers to take industrialist to court for proper wages and benefits.
Bit granted congress the power to tax incomes.
Cit permitted women the right to take business to court for equal pay.
Dit declared settlement houses to be illegal.

Verified Answer :

The effect of the 16th Amendment was that b) It granted Congress the
power to tax incomes. The 16th Amendment to the United States
Constitution allowed Congress to levy taxes without apportioning it to
that specific state or basing it on the United States Census
(apportioning it to the state and according to their respective numbers)
and this included all taxes except income tax.

it allowed congress to levy taxes