How much topsoil have we lost in the last 100 years?

What logical prediction can be made from this passage?

She took up a scalpel and slit the monkey's abdomen, making a slow and gentle cut, keeping the blade well away from her gloved fingers. the spleen was puffed up and tough, leathery, like a globe of smoked salami. she did not see any bloody lesions inside this monkey. she had expected that the monkey's interior would be a lake of blood, but no, this monkey looked all right, it had not bled into itself. if the animal had died of ebola, this was not a clear case. she opened up the intestine. there was no blood inside it. the gut looked okay. then she examined the stomach. there she found a ring of bleeding spots at the junction between the stomach and the small intestine. this could be a sign of ebola, but it was not a clear sign. it could also be a sign of simian fever, not ebola. therefore, she could not confirm the presence of ebola virus in this animal based on a visual inspection of the internal organs during necropsy.

Which is a run-on sentence? a) all of the fish that we caught were too small to keep. b) ricky changed the oil, he forgot to replace the oil filter. c) the striking patriotic design surprised the memorial planning committee. d) everyone on the harbor cruise reported feeling a little seasick and left early.