You are the project manager for a software development team working on a critical project with a tight deadline. The team consists of diverse members with different skill sets and expertise. The client has requested additional features to be incorporated into the project scope, and you are facing challenges in managing time and resources effectively. Answer the following multiple$-$choice questions based on the given scenario.

What is the primary challenge in this case study?

$1$ point

a$.$ Lack of team diversity

b$.$ Tight project deadline

c$.$ Inadequate client communication

d$.$ Insufficient project scope