Use the figure for the question$($s$)$ below.

The above screen shot from Google Finance shows the price history of Progenics, a pharmaceutical company. In the time period shown, Progenics released information that an intravenously $-$ administered formulation of their leading product had failed in a Phase III clinical trial. In which of the months shown in the price history is this most likely to have occurred?

A$.$ March $2008$

B$.$ May $2008$

C$.$ February $2008$

D$.$ April $2008$