Answer:
The answers is ( B ).
finding a western water route to Asia
Step-by-step explanation:
Why did both Spain and Portugal want to find a sea route to Asia? Spain and Portugal wanted to find a sea route to Asia because Portugal did not share trade routes with Asia and Europe (no Meditteranean Ports), Spain wanted to Spread Christianity, and both countries wanted to find more trade.
Just some more information, also just took the unit test, and i hope this helps <3