CR-2 Qs(not sure about the answers)

In recent years, unions have begun to include in their demands at the
collective bargaining table requests for contract provisions which
give labor an active voice in determining the goals of a corporation.
Although it cannot be denied that labor leaders are highly skilled
administrators, it must be recognized that their primary loyalty is
and must remain to their membership, not to the corporation. Thus,
labor participation in corporate management decisions makes about as
much sense as __________.
Which of the following represents the best continuation of the
passage?
1. allowing inmates to make decisions about prison security
2. a senior field officer asking the advice of a junior officer on a
question of tactics
3. a university's asking the opinion of the student body on the
scheduling of courses
4. Chicago's mayor inviting the state legislators for a ride on the
city's subway system
5. the members of a church congregation discussing theology with the
minister

Land Management Specialist:
"Building the Glenn Canyon dam on the Colorado river caused unforeseen
environmental effects. One of these is that, by preventing annual
floods, the dam prevents the river from stirring up sediments
collected on the river bottom and depositing them high on the banks of
the river. The deposited sediments are needed to create and maintain
sandbars, which form natural habitats for native fish. By releasing
water from the dam annually, we will flood the river and thus recreate
the sandbars normally found below the dam."
Which of the following must be true if the prediction of the land
management specialist above is also to prove true?
1. There are no other effects of the dam which will prevent the native
fish of the river from using the new sandbars below the dam.
2. The flood caused by massively releasing water from the dam will be
like a natural flood in every major respect.
3. The size of a sandbar on a river always stays the same or increases
after a flood.
4. Any other dams upriver from the Glen Canyon dam must also release
enough water to cause a flood in order for the flood from the Glen
Canyon dam to be successful.
5. The dam does not prevent the flow of sediments from upriver needed
to replenish the sediments that inevitably wash downstream over time.

Can someone please explain the answers to these questions?

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