Answer:
B
Explanation:
Bid rotation is when contractors collude and take turns in winning a bid. Colluding contractors submit bids but take turns being the low bidder.
Bid-tailoring is when an employee in collusion with a contractor tailors bid specifications to give an unfair advantage to a certain contractor.
Complementary bids are bids intended only to give the appearance of a genuine bid. Colluding bidders submit higher priced or deliberately defective bids to in order to ensure the selection of the designated winner at inflated prices.
Phantom bids are fake bids
