Question

how did trade help to spread islam?
merchants were able to hold debates with other religious leaders along trade routes.
merchants were able to spread ideas regarding islam, only within the arabian peninsula.
merchants shared ideas about islam with their trade partners, muslim missionaries joined them as well.
merchants traveled with large groups of educators of islam.

Explanation:

Merchants played a key - role in spreading Islam through trade. They interacted with trade partners and Muslim missionaries sometimes accompanied them, facilitating the spread of Islamic ideas. Debates with religious leaders were not the main way, and the spread was not limited to the Arabian Peninsula, and there is no evidence of traveling with large groups of Islamic educators.

Answer:

Merchants shared ideas about Islam with their trade partners, Muslim missionaries joined them as well.