Aside from financing, the term burn rate is also used in project management to determine the rate at which hours (allocated to a project) are being used, to identify when work is going out of scope, or when efficiencies are being lost.
In earned value management, burn rate is calculated via the formula, 1/CPI, where CPI stands for Cost Performance Index, which is equal to Earned Value / Actual Cost.
Source: Wikipedia
http://en.wikipedia.org/wiki/Burn_rate
you can check also:
http://www.hyperthot.com/pm_cscs.htm
Any thoughts on why the answer is d??