why were the Spanish and Portuguese so interested in finding new ways to get to Asia?

a-Europeans could not trade over land or the mediterranean sea.
b-they had never traveled to Asia before
c-they wanted to have more control over trade by avoiding the use of middlemen.
d-they wanted to use new sailing technologies

b-they had never traveled to Asia before

c-they wanted to have more control over trade by avoiding the use of middlemen.

d-they wanted to use new sailing technologies