When auditing the award of a major contract, which of the following should an internal...

When auditing the award of a major contract, which of the following should an internal auditor suspect as a red flag for a bidding fraud scheme?

1. Subsequent change orders increase requirements for low-bid items.

2. Material contract requirements are different on the actual contract than on the request for bids.

3. A high percentage of employees are charged to indirect accounts.

4. Losing bidders are hired as subcontractors.