Estimates in the earliest stages of project selection are usually made using estimates based from previous projects that can be _____-multiplied by an adjustment factor to make the new estimate proportional to the original.

A) aggregated
B) subtotaled
C) scaled
D) predefined
E) rolled up

The term "scaled" best fits the description of adjusting a previous estimate to fit a new project by multiplying it with an adjustment factor. "Aggregated" and "subtotaled" imply adding up individual estimates, "predefined" suggests using set values rather than adjusting, and "rolled up" refers to summarizing multiple estimates into a single total.