Which rock is least likely to be a sedimentary rock? a rock showing mud cracks
a rock with evidence of air bubbles
a rock containing dinosaur bones
Oa rock consisting of layers of compacted sediments

Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at the Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles to settle in place.

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.