The most informal training and development program is:

A) job rotation
B) supervisory assistance and mentoring
C) programmed instruction
D) sensitivity training
E) role playing

Supervisory assistance and mentoring is the most informal training and development program. This is because it involves one-on-one guidance, coaching, and feedback from a supervisor or mentor, without a structured curriculum, course materials, or formal assessments. This type of training is often based on the needs of the individual employee and tends to be flexible and personalized. Job rotation, programmed instruction, sensitivity training, and role playing are all more formal training programs with defined objectives, content, and delivery methods.