Final answer:
Segregating students with intellectual disabilities from the rest of the class is the least likely strategy to promote successful inclusion.
Step-by-step explanation:
The strategy that is least likely to promote successful inclusion for students with intellectual disabilities is d) Segregating students with intellectual disabilities from the rest of the class. Inclusion involves immersing students with disabilities in a standard classroom, allowing them to participate alongside their peers. Segregation, on the other hand, separates students with disabilities from the rest of the class, which goes against the goal of inclusion.