In a DCF model, how does depreciation relate to capex? Select one: O a capex and depreciation must converge over the long-run in a valuation model O b, capex and depreciation must reconcile in each accounting period O ccapex and depreciation generally differ in a DCF model because one is based on accounting GAAP, and the other is based on actual movements of cash flows for fixed asset investments d. capex and depreciation relate to under and over investment in fixed assets by firms e. capex and depreciation are two sides of the same coin, one is cash flow based, and the other is accounting-based