$\backslash$table$[[$Activity$,$Activity Description,Duration,Predecessors$],[$A$,$Conduct competitive analysis,$3,-],[$B$,$Review field sales reports,$2,$A$],[$C$,$Conduct tech capabilities assessment,$5,$A$],[$D$,$Develop focus group data,$2,$A$,$ B$,$ C$],[$E$,$Conduct telephone surveys,$3,$D$],[$F$,$Identify relevant specification improvements,$3,$E$],[$G$,$Interface with marketing staff,$1,$F$],[$H$,$Develop engineering specifications,$5,$G$],[$I$,$Check and debug designs,$4,$H$],[$J$,$Develop testing protocol,$3,$G$],[$K$,$Identify critical performance levels,$2,$J$],[$L$,$Assess and modify product components,$6,$I, K$],[$M$,$Conduct capabilities assessment,$12,$L$],[$N$,$Identify selection criteria,$3,$M$],[$O$,$Develop RFQ $($Request for Quote$),4,$M$],[$P$,$Develop production master schedule,$5,$N$,$ O$],[$Q$,$Collaborate with sales staff,$1,$P$],[$R$,$Prepare product launch,$3,$Q$]]$

Identify the total Duration:

A$)34$ days

B$)55$ days

C$)57$ days

D$)62$ days