If an advertising period is too long, ads may suffer from ________, which means the audience gets tired of them and stops paying attention

Which of the following statements about Bechtel is true?

A) Even though Bechtel is over 100 years old, the Kuwaiti oil fields was its first "project." B) Bechtel is the world's premier manager of massive construction and engineering projects. C) Bechtel's competitive advantage is supply chain management. D) While its projects are worldwide, its network of suppliers is largely in the United States E) All of the above are true.

How many columns will a relation resulting from mapping the Entity Y have?

A) 2 B) 3 C) 4 D) 5