The answer is B. If a cell has a nucleus its a eukaryote
I took the test and the answer is not shear, so don't put that one. My next choice would have been strain.
Eruptions at shield volcanoes are only explosive if water somehow gets into the vent , otherwise they are characterized by low-explosivity fountaining that forms cinder cones and spatter cones at the vent, however, 90% of the volcano is lava rather than pyroclastic material.
A is the answer. Hope that helped.