In 1986, portugal and spain both a) gained independence from the moors b) signed a treaty dividing latin america c) joined the european union d) granted independence to their colonies

They joined the European Union

(C) portugal and spain both joined the European union 

This would be an open primary. a closed primary people can vote only prior to election day if the party if they are registered. independent voters can not participate. there is not a wide-open primary, but there is a semi-open primary.

Answerwill have thinner; have thicker oceanic sediments;