Your firm has been awarded an IDOT contract to overlay several miles of rural highway pavement with a new, thin-layer concrete surface. You will most likely prepare monthly pay requests using which of the following methods? Select one: a. Tabulating work completed by updating the % complete of each activity in the project's cost loaded schedule. b. Tracking all expenditures by Division and applying a set fee to expenditure totals. c. Counting, measuring, and invoicing for units of work placed. d. Tabulating work completed by updating the project's schedule of values