Devon, a project manager, is working on a software development project. He needs more coders to complete the project on time. As a result, he hires people and they are given on$-$the$-$job training by their coworkers. However, this significantly reduces the output of the team and leads to a delay in the project. The given scenario exemplifies:

Group of answer choices

a$.$ integration management fallacy.

b$.$ the mythical man$-$month effect.

c$.$ the boomerang effect.

d$.$ law of diminishing returns.