Which statement accurately describes n important contribution of the spanish monarchs king ferdinand and queen isabella?

a. their decision to provide christoper columbus with a strong army allowed spain to completely control sea routes from europe to the americas.

b. their decision to support christopher columbis's expedition demonstrated that the earth was smaller than previously thought.

c. their decision to approve christopher columbuss voyage led to catholicism becoming the cominant religion in the americas.

d. their decision to finance christopher columbus's voyage led directly to the beginning of european exploration of the americas.

- apex