Final answer:
The delegate from a less populous state attending the constitutional convention would likely support the New Jersey Plan, which proposed equal representation for all states, regardless of population size.
Step-by-step explanation:
The delegate from a less populous state attending the constitutional convention would likely support B. The New Jersey Plan, which proposed equal representation for all states, regardless of population size. The New Jersey Plan was put forward as a counter to the Virginia Plan, which advocated for representation based on population and provided more influence to larger states. The New Jersey Plan aimed to ensure that smaller states had equal power in the national legislature and protected their interests.