If a rider is attached to a bill, it must be introduced before what event?
a.) first reading
b.) second reading
c.) debate
d.) vote

First reading

Explanation:

If a rider is attached to a bill, it must be introduced before the first reading. The first reading  of a bill refers to the moment when this is introduced to a legislature. This is called the "first reading" as there are various stages that a bill is subjected to as it goes through the process of becoming legislation.

the u.s. department of labor is a cabinet-level federal agency that supports the american labor force. it has three overall functions. first, it protects the rights of workers and retirees. second, it provides job training. third, it provides statistics related to working, prices, and income.

d. direct