QUESTION 7 Pick all the correct options a. Cost escalation in projects only occurs due to changes requested by the client. b. An engineering bottom-up estimate provides much more detail than estimates by analogy c. Direct costs include building rents, utilities and insurance among others. d. A bill of materials is a list of the parts or components that are required to build a product. e. Overhead costs are chargeable to specific workpackages. Of. A top-down approach in costing involves estimating the cost of every activity in a project. Og. Bottom-up and top-down approaches in costing are both applicable from the conception phase of a project. Oh. The bottom-up approach provides better estimates than the top-down, but is more time consuming and requires more data