The horizontal axis of the cladogram depicted below is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. The labelled branch points on the tree (V-Z) represent various common ancestors. Let's say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species. 
-Which of the five species, labelled V-Z, is the common ancestor of the fewest number of species?
Definitions:
Financial Statement
A written record that conveys the business activities and financial performance of a company, typically including the balance sheet, income statement, and cash flow statement.
Permanent/Temporary
Refers to accounts on a company's balance sheet that are carried over from one accounting period to the next, with permanent indicating long-term accounts and temporary indicating accounts that are closed at the end of each period.
Coal Deposit
A geological formation containing a natural accumulation of coal, which can be mined for use as a fuel.
Tons Available
A measurement indicating the quantity of a commodity or material expressed in tons that is available for use or sale.
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