Blackburn Ltd Grants 50 Share Options to Each of Its

Blackburn Ltd grants 50 share options to each of its 150 employees on 1 July 2009.Each grant is conditional upon the employee working for the company for 3 years following the grant date.On grant date,the fair value of each option is estimated to be $12. Estimated value of the option for the year ending 2010,2011 and 2012 is $10,$13,$14 respectively.
Information on employee departures at the end of each year follows:
$$\begin{array} { | l | l | l | } \hline \text { Year ending 30 June } & \text { Actual departures } & \begin{array} { l } \text { Revised estimate of departures } \\\text { before option vests }\end{array} \\\hline 2010 & 7 & 22 \% \\\hline 2011 & 6 & 18 \% \\\hline 2012 & 4 & \text { NA } \\\hline\end{array}$$
In accordance with AASB 2,how much remuneration expense related to the share option issue should Blackburn Ltd recognise for the year ended 30 June 2010,30 June 2011 and 30 June 2012 respectively?

A) $19 500; $33 800; $39 800
B) $23 400; $25 800; $30 600
C) $23 400; $29 900; $39 800
D) $23 833; $35 534; $33 733