Tom is managing a software development project in a large IT firm. According to the project essential requirements, he has written an email to one of the functional managers and requested a number of staff to be assigned to his project on a permanent basis for a $2-$week period. The functional manager has rejected Tom's request. What $?$should Tom do in this situation

Record this as a risk in the risk register $.$a Change the sequence of activities so that he can cope with the $.$b resource limitations

Raise the issue to higher level managers who can decide on project $.$c priorities

Negotiate with the functional manager $.$d