Why were merchants able to achieve social mobility

By having enough profit, Merchant could buy more lands and hire for soldiers for them.
This will make them had a similar power to those of the nobilities, making them go up in the social class

hope this helps

Why were merchants able to achieve social mobility

They were able to move to social mobility due to the social system that allows them to move up and down the social hierarchy. Merchants had a better chance of doing so by investing their money on land and taking advantage of other advantages.

I hope it helps, Regards.